diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/api/pokemon/PokemonSpecies.kt b/common/src/main/kotlin/com/cobblemon/mod/common/api/pokemon/PokemonSpecies.kt
index 36b18e5ff5..43bbde762e 100644
--- a/common/src/main/kotlin/com/cobblemon/mod/common/api/pokemon/PokemonSpecies.kt
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/api/pokemon/PokemonSpecies.kt
@@ -28,6 +28,7 @@ import com.cobblemon.mod.common.api.pokemon.transformation.evolution.PreEvolutio
 import com.cobblemon.mod.common.api.pokemon.transformation.requirement.TransformationRequirement
 import com.cobblemon.mod.common.api.pokemon.experience.ExperienceGroup
 import com.cobblemon.mod.common.api.pokemon.experience.ExperienceGroupAdapter
+import com.cobblemon.mod.common.api.pokemon.labels.CobblemonPokemonLabels
 import com.cobblemon.mod.common.api.pokemon.moves.Learnset
 import com.cobblemon.mod.common.api.pokemon.stats.Stat
 import com.cobblemon.mod.common.api.pokemon.stats.Stats
@@ -43,6 +44,9 @@ import com.cobblemon.mod.common.pokemon.SpeciesAdditions
 import com.cobblemon.mod.common.pokemon.transformation.predicate.NbtItemPredicate
 import com.cobblemon.mod.common.pokemon.helditem.CobblemonHeldItemManager
 import com.cobblemon.mod.common.pokemon.transformation.adapters.*
+import com.cobblemon.mod.common.pokemon.transformation.form.PermanentForm
+import com.cobblemon.mod.common.pokemon.transformation.form.StandardForm
+import com.cobblemon.mod.common.pokemon.transformation.form.TemporaryForm
 import com.cobblemon.mod.common.util.adapters.*
 import com.cobblemon.mod.common.util.cobblemonResource
 import com.google.common.collect.HashBasedTable
@@ -206,34 +210,18 @@ object PokemonSpecies : JsonDataRegistry<Species> {
     }
 
     /**
-     * The representation of a [Species] and/or [FormData] in the context of showdown.
+     * The representation of [FormData] in the context of Showdown.
      * This is intended as a sort of DTO that can be easily converted between JSON and Java/JS objects.
      *
-     * @param species The [Species] being converted or the base species if the form is not null.
-     * @param form The [FormData] being converted int o species (Showdown considers them species) will be null when dealing with the base form.
+     * @param form The [FormData] being converted into a species (Showdown considers them species).
      */
     @Suppress("unused")
-    internal class ShowdownSpecies(species: Species, form: FormData?) {
-        val num = species.nationalPokedexNumber
-        val name = if (form != null) "${createShowdownName(species)}-${form.name}" else createShowdownName(species)
-        val baseSpecies = if (form != null) createShowdownName(species) else this.name
-        val forme = form?.name
-        // ToDo baseForme
-        val otherFormes = if (form == null && species.forms.isNotEmpty()) species.forms.map { "${this.name}-${it.name}" } else emptyList()
-        val formeOrder = if (form == null && this.otherFormes.isNotEmpty()) arrayListOf(this.name, *this.otherFormes.toTypedArray()) else emptyList()
-        val abilities: Map<String, String> = mapOf(
-            "0" to "No Ability",
-            "1" to "No Ability",
-            "H" to "No Ability",
-            "S" to "No Ability"
-        )
-        val types = (form?.types ?: species.types).map { it.name.replaceFirstChar(Char::uppercase) }
-        val preevo: String? = (form?.preEvolution ?: species.preEvolution)?.let { if (it.form == it.species.standardForm) createShowdownName(it.species) else "${createShowdownName(it.species)}-${it.form.name}" }
-        // For the context of battles the content here doesn't matter whatsoever and due to how PokemonProperties work we can't guarantee an actual specific species is defined.
-        val evos = if ((form?.evolutions ?: species.evolutions).isEmpty()) emptyList() else arrayListOf("")
-        val nfe = this.evos.isNotEmpty()
-        val eggGroups = (form?.eggGroups ?: species.eggGroups).map { it.showdownID }
-        val gender: String? = when (form?.maleRatio ?: species.maleRatio) {
+    internal open class ShowdownSpecies(form: FormData) {
+        val num = form.species.nationalPokedexNumber
+        val name = form.showdownName()
+        val types = form.types.map { it.name.replaceFirstChar(Char::uppercase) }
+        val eggGroups = form.eggGroups.map { it.showdownID }
+        val gender: String? = when (form.maleRatio) {
             0F -> "F"
             1F -> "M"
             -1F, 1.125F -> "N"
@@ -241,35 +229,66 @@ object PokemonSpecies : JsonDataRegistry<Species> {
         }
         val genderRatio = if (this.gender == null)
             mapOf(
-                "maleRatio" to (form?.maleRatio ?: species.maleRatio),
-                "femaleRation" to (1F - (form?.maleRatio ?: species.maleRatio))
+                "maleRatio" to (form.maleRatio),
+                "femaleRation" to (1F - (form.maleRatio))
             ) else null
-        val baseStats = mapOf(
-            "hp" to (form?.baseStats?.get(Stats.HP) ?: species.baseStats[Stats.HP] ?: 1),
-            "atk" to (form?.baseStats?.get(Stats.ATTACK) ?: species.baseStats[Stats.ATTACK] ?: 1),
-            "def" to (form?.baseStats?.get(Stats.DEFENCE) ?: species.baseStats[Stats.DEFENCE] ?: 1),
-            "spa" to (form?.baseStats?.get(Stats.SPECIAL_ATTACK) ?: species.baseStats[Stats.SPECIAL_ATTACK] ?: 1),
-            "spd" to (form?.baseStats?.get(Stats.SPECIAL_DEFENCE) ?: species.baseStats[Stats.SPECIAL_DEFENCE] ?: 1),
-            "spe" to (form?.baseStats?.get(Stats.SPEED) ?: species.baseStats[Stats.SPEED] ?: 1)
-        )
-        val heightm = (form?.height ?: species.height) / 10
-        val weightkg = (form?.weight ?: species.weight) / 10
+        val baseStats = Stats.PERMANENT.associateBy({ it.showdownId }, { form.baseStats[it] ?: 1 })
+        val heightm = form.height / 10
+        val weightkg = form.weight / 10
         // This is ugly, but we already have it hardcoded in the mod anyway
-        val maxHP = if (species.showdownId() == "shedinja") 1 else null
-        val canGigantamax: String? = if (form?.gigantamaxMove != null) form.gigantamaxMove.name else null
-        val cannotDynamax = form?.dynamaxBlocked ?: species.dynamaxBlocked
-        // ToDo battleOnly
-        // ToDo changesFrom
-        val requiredMove = form?.requiredMove
-        val requiredItem = form?.requiredItem
-        val requiredItems = form?.requiredItems
+        val maxHP = if (this.num == 292) 1 else null
+        val cannotDynamax = form.dynamaxBlocked
     }
 
-    private fun createShowdownName(species: Species): String {
-        if (species.resourceIdentifier.namespace == Cobblemon.MODID) {
-            return species.name
-        }
-        return "${species.resourceIdentifier.namespace}:${species.name}"
+    /**
+     * The representation of a [PermanentForm] in the context of Showdown.
+     *
+     * @param form The [PermanentForm] being converted into a species (Showdown considers them species).
+     */
+    internal open class ShowdownPermanentForm(form: PermanentForm) : ShowdownSpecies(form) {
+        val forme = if (form !is StandardForm) form.name else null
+        val baseSpecies = if (form !is StandardForm) form.species.standardForm.showdownName() else null
+        val preevo = form.preEvolution?.form?.showdownName()
+        // For the context of battles the content here doesn't matter whatsoever and due to how PokemonProperties work we can't guarantee an actual specific species is defined.
+        val evos = if (form.evolutions.isEmpty()) emptyList() else arrayListOf("")
+        val nfe = this.evos.isNotEmpty()
+        val canGigantamax = form.temporaryForms.firstOrNull { it.gigantamaxMove != null }?.gigantamaxMove
     }
 
+    /**
+     * The representation of a [StandardForm] in the context of Showdown.
+     *
+     * @param form The [StandardForm] being converted into a species.
+     */
+    internal class ShowdownStandardForm(form: StandardForm) : ShowdownPermanentForm(form) {
+        val otherFormes = form.flattenForms().map { it.showdownName() }
+        val formeOrder = if (this.otherFormes.isNotEmpty()) arrayListOf(this.name, *this.otherFormes.toTypedArray()) else null
+    }
+
+    /**
+     * The representation of a [TemporaryForm] in the context of Showdown.
+     *
+     * @param form The [TemporaryForm] being converted into a species (Showdown considers them species).
+     * @param baseForm The [PermanentForm] that transitions into this [TemporaryForm].
+     */
+    internal class ShowdownTemporaryForm(form: TemporaryForm) : ShowdownSpecies(form) {
+        val forme = form.name
+        val baseSpecies = form.species.standardForm.showdownName()
+        // forms this form can change from during a battle
+        val battleOnly = if (form.battleOnly) form.showdownParentForm() else null
+        // forms this form can change from outside of battle (mutually exclusive with above)
+        val changesFrom = if (!form.battleOnly) form.showdownParentForm() else null
+    }
+
+    /** Accommodate for Showdown bullshit. */
+    private fun TemporaryForm.showdownParentForm(): Any? {
+        // megas and primal don't use battleOnly because... fuck you?
+        if (this.battleOnly && this.labels.any { it == CobblemonPokemonLabels.MEGA || it == CobblemonPokemonLabels.PRIMAL })
+            return null
+        // Necrozma-Ultra and Zygarde-Complete are the only forms where parent form != the forms it can change from
+        else if (this.parentOverrides.isNotEmpty())
+            return this.species.standardForm.flattenForms().filter { parentOverrides.contains(it.showdownId()) }.map { it.showdownName() }
+        else
+            return parentForm?.showdownName()
+    }
 }
\ No newline at end of file
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/battles/runner/ShowdownService.kt b/common/src/main/kotlin/com/cobblemon/mod/common/battles/runner/ShowdownService.kt
index c422d72956..d712890dac 100644
--- a/common/src/main/kotlin/com/cobblemon/mod/common/battles/runner/ShowdownService.kt
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/battles/runner/ShowdownService.kt
@@ -10,6 +10,7 @@ package com.cobblemon.mod.common.battles.runner
 
 import com.cobblemon.mod.common.api.battles.model.PokemonBattle
 import com.cobblemon.mod.common.battles.runner.graal.GraalShowdownService
+import com.cobblemon.mod.common.battles.runner.socket.SocketShowdownService
 import com.google.gson.JsonArray
 import java.util.UUID
 
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/battles/runner/graal/GraalShowdownService.kt b/common/src/main/kotlin/com/cobblemon/mod/common/battles/runner/graal/GraalShowdownService.kt
index 505df16798..cd1b25de64 100644
--- a/common/src/main/kotlin/com/cobblemon/mod/common/battles/runner/graal/GraalShowdownService.kt
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/battles/runner/graal/GraalShowdownService.kt
@@ -157,12 +157,16 @@ class GraalShowdownService : ShowdownService {
         val jsArray = this.context.eval("js", "new Array();")
         var index = 0L
         PokemonSpecies.species.forEach { species ->
-            jsArray.setArrayElement(index++, this.gson.toJson(PokemonSpecies.ShowdownSpecies(species, null)))
-            species.forms.forEach { form ->
-                if (form != species.standardForm) {
-                    jsArray.setArrayElement(index++, this.gson.toJson(PokemonSpecies.ShowdownSpecies(species, form)))
+            jsArray.setArrayElement(index++, this.gson.toJson(PokemonSpecies.ShowdownStandardForm(species.standardForm)))
+            species.permanentForms.forEach { form ->
+                jsArray.setArrayElement(index++, this.gson.toJson(PokemonSpecies.ShowdownPermanentForm(form)))
+                form.temporaryForms.forEach { tempForm ->
+                    jsArray.setArrayElement(index++, this.gson.toJson(PokemonSpecies.ShowdownTemporaryForm(tempForm)))
                 }
             }
+            species.temporaryForms.forEach { tempForm ->
+                jsArray.setArrayElement(index++, this.gson.toJson(PokemonSpecies.ShowdownTemporaryForm(tempForm)))
+            }
         }
         receiveSpeciesDataFn.execute(jsArray)
     }
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/battles/runner/socket/SocketShowdownService.kt b/common/src/main/kotlin/com/cobblemon/mod/common/battles/runner/socket/SocketShowdownService.kt
index dec987e6f2..5a18bbc92f 100644
--- a/common/src/main/kotlin/com/cobblemon/mod/common/battles/runner/socket/SocketShowdownService.kt
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/battles/runner/socket/SocketShowdownService.kt
@@ -123,8 +123,8 @@ class SocketShowdownService(val host: String = "localhost", val port: Int = 1846
         return gson.fromJson(response, JsonArray::class.java)
     }
 
-    private fun sendSpeciesData(species: Species, form: FormData?) {
-        writer.write(">receiveSpeciesData ${gson.toJson(PokemonSpecies.ShowdownSpecies(species, form))}\n")
+    private fun sendSpeciesData(species: PokemonSpecies.ShowdownSpecies) {
+        writer.write(">receiveSpeciesData ${gson.toJson(species)}\n")
         acknowledge()
     }
 
@@ -137,12 +137,16 @@ class SocketShowdownService(val host: String = "localhost", val port: Int = 1846
         writer.write(">resetSpeciesData\n")
         acknowledge()
         PokemonSpecies.species.forEach { species ->
-            sendSpeciesData(species, null)
-            species.forms.forEach { form ->
-                if (form != species.standardForm) {
-                    sendSpeciesData(species, form)
+            sendSpeciesData(PokemonSpecies.ShowdownStandardForm(species.standardForm))
+            species.permanentForms.forEach { form ->
+                sendSpeciesData(PokemonSpecies.ShowdownPermanentForm(form))
+                form.temporaryForms.forEach { tempForm ->
+                    sendSpeciesData(PokemonSpecies.ShowdownTemporaryForm(tempForm))
                 }
             }
+            species.temporaryForms.forEach { form ->
+                sendSpeciesData(PokemonSpecies.ShowdownTemporaryForm(form))
+            }
         }
     }
 
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/command/ChangeEyeHeight.kt b/common/src/main/kotlin/com/cobblemon/mod/common/command/ChangeEyeHeight.kt
index 43f1836750..6d36ffa675 100644
--- a/common/src/main/kotlin/com/cobblemon/mod/common/command/ChangeEyeHeight.kt
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/command/ChangeEyeHeight.kt
@@ -46,8 +46,7 @@ object ChangeEyeHeight {
         val height = FloatArgumentType.getFloat(context, "height")
 
         applicator.invoke(pkm, height)
-        pkm.forms.clear()
-        pkm.forms.add(FormData().also { it.initialize(pkm) })
+        // TODO refresh form
         return Command.SINGLE_SUCCESS
     }
 }
\ No newline at end of file
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/command/ChangeScaleAndSize.kt b/common/src/main/kotlin/com/cobblemon/mod/common/command/ChangeScaleAndSize.kt
index 09c350517a..bb41652363 100644
--- a/common/src/main/kotlin/com/cobblemon/mod/common/command/ChangeScaleAndSize.kt
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/command/ChangeScaleAndSize.kt
@@ -45,8 +45,7 @@ object ChangeScaleAndSize {
 
         pkm.baseScale = scale
         pkm.hitbox = EntityDimensions.scalable(width, height)
-        pkm.forms.clear()
-        pkm.forms.add(FormData().also { it.initialize(pkm) })
+        // TODO refresh form
         return Command.SINGLE_SUCCESS
     }
 }
\ No newline at end of file
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/command/ChangeWalkSpeed.kt b/common/src/main/kotlin/com/cobblemon/mod/common/command/ChangeWalkSpeed.kt
index 54c3207c2f..00a5d66702 100644
--- a/common/src/main/kotlin/com/cobblemon/mod/common/command/ChangeWalkSpeed.kt
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/command/ChangeWalkSpeed.kt
@@ -41,8 +41,7 @@ object ChangeWalkSpeed {
         val walkSpeed = FloatArgumentType.getFloat(context, "walkSpeed")
 
         pkm.behaviour.moving.walk.walkSpeed = walkSpeed.toString().asExpressionLike()
-        pkm.forms.clear()
-        pkm.forms.add(FormData().also { it.initialize(pkm)})
+        // TODO refresh form
         return Command.SINGLE_SUCCESS
     }
 }
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/net/messages/client/pokemon/update/FormUpdatePacket.kt b/common/src/main/kotlin/com/cobblemon/mod/common/net/messages/client/pokemon/update/FormUpdatePacket.kt
index 4f712f8672..2517376340 100644
--- a/common/src/main/kotlin/com/cobblemon/mod/common/net/messages/client/pokemon/update/FormUpdatePacket.kt
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/net/messages/client/pokemon/update/FormUpdatePacket.kt
@@ -10,6 +10,7 @@ package com.cobblemon.mod.common.net.messages.client.pokemon.update
 
 import com.cobblemon.mod.common.pokemon.FormData
 import com.cobblemon.mod.common.pokemon.Pokemon
+import com.cobblemon.mod.common.pokemon.transformation.form.TemporaryForm
 import com.cobblemon.mod.common.util.cobblemonResource
 import net.minecraft.network.RegistryFriendlyByteBuf
 import net.minecraft.resources.ResourceLocation
@@ -29,10 +30,12 @@ class FormUpdatePacket(pokemon: () -> Pokemon, form: FormData) : SingleUpdatePac
         val ID: ResourceLocation = cobblemonResource("packets/form-update")
         fun decode(buffer: RegistryFriendlyByteBuf): FormUpdatePacket {
             val pokemon = decodePokemon(buffer)
+            /*
             val form = FormData()
             form.species = pokemon().species
             form.decode(buffer)
-            return FormUpdatePacket(pokemon, form)
+             */
+            return FormUpdatePacket(pokemon, TemporaryForm())   // TODO fix
         }
     }
 }
\ No newline at end of file
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/FormData.kt b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/FormData.kt
index 51341b19ae..8d7cd93d6c 100644
--- a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/FormData.kt
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/FormData.kt
@@ -16,15 +16,13 @@ import com.cobblemon.mod.common.api.abilities.CommonAbility
 import com.cobblemon.mod.common.api.abilities.PotentialAbility
 import com.cobblemon.mod.common.api.data.ShowdownIdentifiable
 import com.cobblemon.mod.common.api.drop.DropTable
-import com.cobblemon.mod.common.api.moves.MoveTemplate
 import com.cobblemon.mod.common.api.net.Decodable
 import com.cobblemon.mod.common.api.net.Encodable
-import com.cobblemon.mod.common.api.pokemon.PokemonSpecies
 import com.cobblemon.mod.common.api.pokemon.effect.ShoulderEffect
 import com.cobblemon.mod.common.api.pokemon.egg.EggGroup
-import com.cobblemon.mod.common.api.pokemon.transformation.evolution.PreEvolution
 import com.cobblemon.mod.common.api.pokemon.experience.ExperienceGroup
 import com.cobblemon.mod.common.api.pokemon.experience.ExperienceGroups
+import com.cobblemon.mod.common.api.pokemon.feature.SpeciesFeature
 import com.cobblemon.mod.common.api.pokemon.moves.Learnset
 import com.cobblemon.mod.common.api.pokemon.stats.Stat
 import com.cobblemon.mod.common.api.types.ElementalType
@@ -35,15 +33,22 @@ import com.cobblemon.mod.common.net.IntSize
 import com.cobblemon.mod.common.pokemon.abilities.HiddenAbility
 import com.cobblemon.mod.common.pokemon.ai.FormPokemonBehaviour
 import com.cobblemon.mod.common.pokemon.lighthing.LightingData
-import com.cobblemon.mod.common.pokemon.transformation.evolution.Evolution
 import com.cobblemon.mod.common.util.*
 import com.google.gson.annotations.SerializedName
 import net.minecraft.network.RegistryFriendlyByteBuf
 import net.minecraft.world.entity.EntityDimensions
 import net.minecraft.resources.ResourceLocation
 
-class FormData(
-    name: String = "Normal",
+/**
+ * Represents an alternate form of a [Pokemon].
+ *
+ * These variations include changes to the base [Species]' stats. For strictly visual variations, see [SpeciesFeature].
+ *
+ * @author Hiroku
+ * @since Dec 30th, 2021
+ */
+abstract class FormData(
+    name: String = "Standard",
     // Internal for the sake of the base stat provider
     @SerializedName("baseStats")
     internal var _baseStats: MutableMap<Stat, Int>? = null,
@@ -73,16 +78,12 @@ class FormData(
     private val _shoulderEffects: MutableList<ShoulderEffect>? = null,
     @SerializedName("moves")
     private var _moves: Learnset? = null,
-    @SerializedName("evolutions")
-    private val _evolutions: MutableSet<Evolution>? = null,
     @SerializedName("abilities")
     private var _abilities: AbilityPool? = null,
     @SerializedName("drops")
     private var _drops: DropTable? = null,
     @SerializedName("pokedex")
     private var _pokedex: MutableList<String>? = null,
-    @SerializedName("preEvolution")
-    private val _preEvolution: PreEvolution? = null,
     private var standingEyeHeight: Float? = null,
     private var swimmingEyeHeight: Float? = null,
     private var flyingEyeHeight: Float? = null,
@@ -96,15 +97,6 @@ class FormData(
     private var _height: Float? = null,
     @SerializedName("weight")
     private var _weight: Float? = null,
-    val requiredMove: String? = null,
-    val requiredItem: String? = null,
-    /** For forms that can accept different items (e.g. Arceus-Grass: Meadow Plate or Grassium-Z). */
-    val requiredItems: List<String>? = null,
-    /**
-     * The [MoveTemplate] of the signature attack of the G-Max form.
-     * This is always null on any form aside G-Max.
-     */
-    val gigantamaxMove: MoveTemplate? = null,
     @SerializedName("battleTheme")
     private var _battleTheme: ResourceLocation? = null,
     @SerializedName("lightingData")
@@ -162,9 +154,6 @@ class FormData(
 
     var aspects = mutableListOf<String>()
 
-    val preEvolution: PreEvolution?
-        get() = _preEvolution ?: species.preEvolution
-
     val behaviour = FormPokemonBehaviour()
 
     val dynamaxBlocked: Boolean
@@ -189,12 +178,23 @@ class FormData(
         get() = _labels ?: species.labels
 
     /**
-     * Contains the evolutions of this form.
-     * Do not access this property immediately after a species is loaded, it requires all species in the game to be loaded.
-     * To be aware of this gamestage subscribe to [PokemonSpecies.observable].
+     * The [FormData] that precedes this form. Null if a parent form does not exist.
+     *
+     * For example the parent of Toxtricity's 'Gmax' form can be either its  'Low-Key' or 'Standard' form.
+     * The parent of Toxtricity's 'Low-Key' form is its 'Standard' form.
+     * And the parent of Toxtricity's 'Standard' form is null (does not exist).
      */
-    val evolutions: MutableSet<Evolution>
-        get() = _evolutions ?: mutableSetOf()
+    @delegate:Transient
+    val parentForm: FormData? by lazy { parentFormInitializer }
+
+    @delegate:Transient
+    val species: Species by lazy { speciesInitializer }
+
+    @Transient
+    private var parentFormInitializer: FormData? = null
+
+    @Transient
+    private lateinit var speciesInitializer: Species
 
     val battleTheme: ResourceLocation
         get() = _battleTheme ?: species.battleTheme
@@ -218,30 +218,17 @@ class FormData(
         else -> this.standingEyeHeight
     }
 
-    @Transient
-    lateinit var species: Species
-
-    fun initialize(species: Species): FormData {
-        this.species = species
+    open fun initialize(species: Species, parent: FormData? = null): FormData {
+        this.speciesInitializer = species
+        this.species
+        this.parentFormInitializer = parent
+        this.parentForm
         this.behaviour.parent = species.behaviour
         Cobblemon.statProvider.provide(this)
-        // These properties are lazy, these need all species to be reloaded but SpeciesAdditions is what will eventually trigger this after all species have been loaded
-        this.preEvolution?.species
-        this.preEvolution?.form
-        this.evolutions.size
         this._lightingData?.let { this._lightingData = it.copy(lightLevel = it.lightLevel.coerceIn(0, 15)) }
         return this
     }
 
-    internal fun resolveEvolutionMoves() {
-        this.evolutions.forEach { evolution ->
-            if (evolution.learnableMoves.isNotEmpty() && evolution.result.species != null) {
-                val pokemon = evolution.result.create()
-                pokemon.form.moves.evolutionMoves += evolution.learnableMoves
-            }
-        }
-    }
-
     override fun equals(other: Any?): Boolean = other is FormData && other.showdownId() == this.showdownId()
 
     override fun hashCode(): Int = this.showdownId().hashCode()
@@ -280,6 +267,7 @@ class FormData(
                 pb.writeString(ability.template.name)
             }
         }
+        //TODO encode/decode Transformation properties of TemporaryForms
     }
 
     override fun decode(buffer: RegistryFriendlyByteBuf) {
@@ -324,7 +312,7 @@ class FormData(
      *
      * @return The literal Showdown ID of this species and form.
      */
-    override fun showdownId(): String = this.species.showdownId() + this.formOnlyShowdownId()
+    override fun showdownId(): String = this.parentForm?.let { parent -> parent.showdownId() + this.formOnlyShowdownId() } ?: this.species.showdownId()
 
     /**
      * The literal Showdown ID of this form [name].
@@ -335,4 +323,11 @@ class FormData(
      */
     fun formOnlyShowdownId(): String = ShowdownIdentifiable.REGEX.replace(this.name.lowercase(), "")
 
+    /**
+     * The Showdown name of this form appended to [Species.showdownName].
+     * For example form 'Gmax' of parent form 'Low-Key' of species 'Toxtricity' becomes 'Toxtricity-Low-Key-Gmax'.
+     *
+     * @return The Showdown name of this species and form.
+     */
+    open fun showdownName(): String = this.parentForm?.let { parent -> parent.showdownName() + "-" + this.name } ?: this.species.showdownName()
 }
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/Pokemon.kt b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/Pokemon.kt
index 39ef904e7f..93784a04b9 100644
--- a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/Pokemon.kt
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/Pokemon.kt
@@ -101,6 +101,7 @@ import com.cobblemon.mod.common.pokemon.properties.BattleCloneProperty
 import com.cobblemon.mod.common.pokemon.properties.UncatchableProperty
 import com.cobblemon.mod.common.pokemon.status.PersistentStatus
 import com.cobblemon.mod.common.pokemon.status.PersistentStatusContainer
+import com.cobblemon.mod.common.pokemon.transformation.form.PermanentForm
 import com.cobblemon.mod.common.util.DataKeys
 import com.cobblemon.mod.common.util.cobblemonResource
 import com.cobblemon.mod.common.util.codec.internal.ClientPokemonP1
@@ -191,7 +192,7 @@ open class Pokemon : ShowdownIdentifiable {
             _species.emit(value)
         }
 
-    var form = species.standardForm
+    var form: FormData = species.standardForm
         set(value) {
             val old = field
             // Species updates already update HP but just a form change may require it
@@ -515,11 +516,17 @@ open class Pokemon : ShowdownIdentifiable {
     val storeCoordinates = SettableObservable<StoreCoordinates<*>?>(null)
 
     // We want non-optional evolutions to trigger first to avoid unnecessary packets and any cost associate with an optional one that would just be lost
-    val evolutions: Iterable<Evolution> get() = this.form.evolutions.sortedBy { evolution -> evolution.optional }
+    val evolutions: Iterable<Evolution> get() {
+        val form = this.form
+        return if (form is PermanentForm) form.evolutions.sortedBy { evolution -> evolution.optional } else this.species.evolutions
+    }
     val lockedEvolutions: Iterable<Evolution>
         get() = evolutions.filter { it !in evolutionProxy.current() }
 
-    val preEvolution: PreEvolution? get() = this.form.preEvolution
+    val preEvolution: PreEvolution? get() {
+        val form = this.form
+        return if (form is PermanentForm) form.preEvolution else this.species.preEvolution
+    }
 
     /**
      * Provides the sided [EvolutionController]s, these operations can be done safely with a simple side check.
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/Species.kt b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/Species.kt
index 6b8aa7c332..9edfc31681 100644
--- a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/Species.kt
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/Species.kt
@@ -22,12 +22,12 @@ import com.cobblemon.mod.common.api.pokemon.PokemonProperties
 import com.cobblemon.mod.common.api.pokemon.PokemonSpecies
 import com.cobblemon.mod.common.api.pokemon.effect.ShoulderEffect
 import com.cobblemon.mod.common.api.pokemon.egg.EggGroup
-import com.cobblemon.mod.common.pokemon.FormData
 import com.cobblemon.mod.common.pokemon.transformation.evolution.Evolution
 import com.cobblemon.mod.common.api.pokemon.transformation.evolution.PreEvolution
 import com.cobblemon.mod.common.api.pokemon.experience.ExperienceGroups
 import com.cobblemon.mod.common.api.pokemon.moves.Learnset
 import com.cobblemon.mod.common.api.pokemon.stats.Stat
+import com.cobblemon.mod.common.api.pokemon.transformation.Transformation
 import com.cobblemon.mod.common.api.types.ElementalType
 import com.cobblemon.mod.common.api.types.ElementalTypes
 import com.cobblemon.mod.common.entity.PoseType.Companion.FLYING_POSES
@@ -37,6 +37,9 @@ import com.cobblemon.mod.common.net.IntSize
 import com.cobblemon.mod.common.pokemon.abilities.HiddenAbility
 import com.cobblemon.mod.common.pokemon.ai.PokemonBehaviour
 import com.cobblemon.mod.common.pokemon.lighthing.LightingData
+import com.cobblemon.mod.common.pokemon.transformation.form.PermanentForm
+import com.cobblemon.mod.common.pokemon.transformation.form.StandardForm
+import com.cobblemon.mod.common.pokemon.transformation.form.TemporaryForm
 import com.cobblemon.mod.common.util.*
 import com.cobblemon.mod.common.util.codec.CodecUtils
 import com.mojang.serialization.Codec
@@ -109,10 +112,23 @@ class Species : ClientDataSynchronizer<Species>, ShowdownIdentifiable {
     var weight = 1F
         private set
 
-    var forms = mutableListOf<FormData>()
+    var permanentForms = mutableListOf<PermanentForm>()
         private set
 
-    val standardForm by lazy { FormData(_evolutions = this.evolutions).initialize(this) }
+    var temporaryForms = mutableListOf<TemporaryForm>()
+        private set
+
+    val standardForm by lazy {
+        StandardForm(
+            _evolutions = this.evolutions,
+            _permanentForms = this.permanentForms,
+            _temporaryForms = this.temporaryForms
+        ).initialize(this) as StandardForm
+    }
+
+    val forms: Collection<FormData> get() = permanentForms + temporaryForms
+
+    val transformations: Collection<Transformation> get() = evolutions + temporaryForms
 
     var labels = hashSetOf<String>()
         private set
@@ -164,15 +180,13 @@ class Species : ClientDataSynchronizer<Species>, ShowdownIdentifiable {
 
     fun initialize() {
         Cobblemon.statProvider.provide(this)
-        this.forms.forEach { it.initialize(this) }
-        if (this.forms.isNotEmpty() && this.forms.none { it == this.standardForm }) {
-            this.forms.add(0, this.standardForm)
-        }
         this.lightingData?.let { this.lightingData = it.copy(lightLevel = it.lightLevel.coerceIn(0, 15)) }
         // These properties are lazy, these need all species to be reloaded but SpeciesAdditions is what will eventually trigger this after all species have been loaded
         this.preEvolution?.species
         this.preEvolution?.form
         this.evolutions.size
+        // init all forms
+        this.standardForm
     }
 
     // Ran after initialize due to us creating a Pokémon here which requires all the properties in #initialize to be present for both this and the results, this is the easiest way to quickly resolve species + form
@@ -183,7 +197,7 @@ class Species : ClientDataSynchronizer<Species>, ShowdownIdentifiable {
                 pokemon.form.moves.evolutionMoves += evolution.learnableMoves
             }
         }
-        this.forms.forEach(FormData::resolveEvolutionMoves)
+        this.permanentForms.forEach(PermanentForm::resolveEvolutionMoves)
     }
 
     fun create(level: Int = 10) = PokemonProperties.parse("species=\"${this.name}\" level=${level}").create()
@@ -227,8 +241,9 @@ class Species : ClientDataSynchronizer<Species>, ShowdownIdentifiable {
         // Hitbox end
         this.moves.encode(buffer)
         buffer.writeCollection(this.pokedex) { pb, line -> pb.writeString(line) }
-        buffer.writeCollection(this.forms) { _, form -> form.encode(buffer) }
         buffer.writeIdentifier(this.battleTheme)
+        buffer.writeCollection(this.permanentForms) { _, form -> form.encode(buffer) }
+        buffer.writeCollection(this.temporaryForms) { _, form -> form.encode(buffer) }
         buffer.writeCollection(this.features) { pb, feature -> pb.writeString(feature) }
         buffer.writeNullable(this.lightingData) { pb, data ->
             pb.writeInt(data.lightLevel)
@@ -261,9 +276,11 @@ class Species : ClientDataSynchronizer<Species>, ShowdownIdentifiable {
         this.moves.decode(buffer)
         this.pokedex.clear()
         this.pokedex += buffer.readList { pb -> pb.readString() }
-        this.forms.clear()
-        this.forms += buffer.readList{ FormData().apply { decode(buffer) } }.filterNotNull()
         this.battleTheme = buffer.readIdentifier()
+        this.permanentForms.clear()
+        this.permanentForms += buffer.readList{ PermanentForm().apply { decode(buffer) } }.filterNotNull()
+        this.temporaryForms.clear()
+        this.temporaryForms += buffer.readList{ TemporaryForm().apply { decode(buffer) } }.filterNotNull()
         this.features.clear()
         this.features += buffer.readList { pb -> pb.readString() }
         this.lightingData = buffer.readNullable { pb -> LightingData(pb.readInt(), pb.readEnumConstant(LightingData.LiquidGlowMode::class.java)) }
@@ -308,7 +325,7 @@ class Species : ClientDataSynchronizer<Species>, ShowdownIdentifiable {
     /**
      * The literal Showdown ID of this species.
      * This will be a lowercase version of the [name] with all the non-alphanumeric characters removed. For example, "Mr. Mime" becomes "mrmime".
-     * If a Species is not a part of the Cobblemon mon the [resourceIdentifier] will have the namespace appended at the start of the ID resulting in something such as 'somemodaspecies'
+     * If a Species is not a part of the Cobblemon mod, the [resourceIdentifier] will have the namespace appended at the start of the ID resulting in something such as 'somemodaspecies'
      *
      * @return The literal Showdown ID of this species.
      */
@@ -330,6 +347,19 @@ class Species : ClientDataSynchronizer<Species>, ShowdownIdentifiable {
      */
     private fun unformattedShowdownId(): String = ShowdownIdentifiable.REGEX.replace(this.name.lowercase(), "")
 
+    /**
+     * The Showdown name of this species.
+     * If a species is not a part of the Cobblemon mod, the [resourceIdentifier] will have the namespace appended at
+     * the start of the name. 'Namespace:Species'.
+     *
+     * @return The Showdown name of this species.
+     */
+    fun showdownName(): String {
+        val namespace = this.resourceIdentifier.namespace
+        val name = this.name
+        return if (namespace == Cobblemon.MODID) name else "$namespace:$name"
+    }
+
     override fun toString() = this.showdownId()
 
     companion object {
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/form/PermanentForm.kt b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/form/PermanentForm.kt
new file mode 100644
index 0000000000..781c0fb539
--- /dev/null
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/form/PermanentForm.kt
@@ -0,0 +1,72 @@
+package com.cobblemon.mod.common.pokemon.transformation.form
+
+import com.cobblemon.mod.common.Cobblemon
+import com.cobblemon.mod.common.api.pokemon.feature.SpeciesFeature
+import com.cobblemon.mod.common.api.pokemon.PokemonSpecies
+import com.cobblemon.mod.common.api.pokemon.transformation.Transformation
+import com.cobblemon.mod.common.api.pokemon.transformation.evolution.PreEvolution
+import com.cobblemon.mod.common.pokemon.FormData
+import com.cobblemon.mod.common.pokemon.Species
+import com.cobblemon.mod.common.pokemon.transformation.evolution.Evolution
+import com.google.gson.annotations.SerializedName
+
+/**
+ * A form of a [Species] that is noninterchangeable with the [StandardForm]. These forms behave like a different species,
+ * and can have a unique set of interchangeable [TemporaryForm]s, but share the same dex number. They are a variation
+ * determined by [Evolution] or [SpeciesFeature].
+ *
+ * For example:
+ * https://bulbapedia.bulbagarden.net/wiki/Regional_form
+ * https://bulbapedia.bulbagarden.net/wiki/Lycanroc#Forms
+ *
+ * @author Segfault Guy
+ * @since October 21st, 2023
+ */
+open class PermanentForm (
+    @SerializedName("evolutions")
+    private val _evolutions: MutableSet<Evolution>? = null,
+    @SerializedName("preEvolution")
+    private val _preEvolution: PreEvolution? = null,
+    @SerializedName("temporaryForms")
+    private val _temporaryForms: MutableList<TemporaryForm>? = null,
+) : FormData() {
+
+    /**
+     * Contains the evolutions of this form.
+     * Do not access this property immediately after a species is loaded, it requires all species in the game to be loaded.
+     * To be aware of this gamestage subscribe to [PokemonSpecies.observable].
+     */
+    val evolutions: MutableSet<Evolution>
+        get() = _evolutions ?: mutableSetOf()
+
+    val preEvolution: PreEvolution?
+        get() = _preEvolution ?: species.preEvolution
+
+    val temporaryForms: MutableList<TemporaryForm>
+        get() = _temporaryForms ?: mutableListOf()
+
+    open val forms: List<FormData> get() = temporaryForms
+
+    open val transformations: List<Transformation> get() = temporaryForms + evolutions
+
+    override fun initialize(species: Species, parent: FormData?): FormData {
+        super.initialize(species, parent)
+        // These properties are lazy, these need all species to be reloaded but SpeciesAdditions is what will eventually trigger this after all species have been loaded
+        this.preEvolution?.species
+        this.preEvolution?.form
+        this.evolutions.size
+        // init nested forms
+        this.forms.forEach { it.initialize(species, this) }
+        return this
+    }
+
+    internal fun resolveEvolutionMoves() {
+        this.evolutions.forEach { evolution ->
+            if (evolution.learnableMoves.isNotEmpty() && evolution.result.species != null) {
+                val pokemon = evolution.result.create()
+                pokemon.form.moves.evolutionMoves += evolution.learnableMoves
+            }
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/form/StandardForm.kt b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/form/StandardForm.kt
new file mode 100644
index 0000000000..90020bcc9a
--- /dev/null
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/form/StandardForm.kt
@@ -0,0 +1,30 @@
+package com.cobblemon.mod.common.pokemon.transformation.form
+
+import com.cobblemon.mod.common.pokemon.FormData
+import com.cobblemon.mod.common.pokemon.Species
+import com.cobblemon.mod.common.pokemon.transformation.evolution.Evolution
+import com.google.gson.annotations.SerializedName
+
+/**
+ * The [FormData] representation of a [Species].
+ *
+ * @author Segfault Guy
+ * @since December 10th, 2023
+ */
+class StandardForm(
+    @SerializedName("evolutions")
+    private val _evolutions: MutableSet<Evolution>? = null,
+    @SerializedName("temporaryForms")
+    private val _temporaryForms: MutableList<TemporaryForm>? = null,
+    @SerializedName("regularForms")
+    private val _permanentForms: MutableList<PermanentForm>? = null,
+) : PermanentForm(_evolutions = _evolutions, _temporaryForms = _temporaryForms) {
+
+    val permanentForms: MutableList<PermanentForm>
+        get() = _permanentForms ?: mutableListOf()
+
+    override val forms: List<FormData> = this.temporaryForms + this.permanentForms
+
+    /** Aggregates child forms and their nested forms. */
+    fun flattenForms(): List<FormData> = this.forms + this.permanentForms.filter { it != this }.flatMap { it.temporaryForms }
+}
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/form/TemporaryForm.kt b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/form/TemporaryForm.kt
new file mode 100644
index 0000000000..f6afcbb48a
--- /dev/null
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/form/TemporaryForm.kt
@@ -0,0 +1,38 @@
+package com.cobblemon.mod.common.pokemon.transformation.form
+
+import com.cobblemon.mod.common.api.moves.MoveTemplate
+import com.cobblemon.mod.common.api.pokemon.transformation.Transformation
+import com.cobblemon.mod.common.api.pokemon.transformation.requirement.TransformationRequirement
+import com.cobblemon.mod.common.api.pokemon.transformation.trigger.TransformationTrigger
+import com.cobblemon.mod.common.pokemon.FormData
+import com.cobblemon.mod.common.pokemon.Species
+import com.cobblemon.mod.common.pokemon.transformation.triggers.ItemInteractionTrigger
+
+/**
+ * A form of a [Species] that is interchangeable with a parent [PermanentForm]. These forms are temporary and may be toggled
+ * OUTSIDE of battle by its [TransformationTrigger] when the [TransformationRequirement]s are satisfied.
+ *
+ * For example:
+ * https://bulbapedia.bulbagarden.net/wiki/Mega_Evolution
+ * https://bulbapedia.bulbagarden.net/wiki/Rotom#Forms
+ *
+ * Note: triggering of forms INSIDE a battle is forced by Showdown.
+ *
+ * @author Segfault Guy
+ * @since October 21st, 2023
+ */
+class TemporaryForm (
+    /** The [MoveTemplate] of the signature attack of the G-Max form. This is always null on any form aside G-Max. */
+    val gigantamaxMove: MoveTemplate? = null,
+    /** Whether this form is triggered during a battle. */
+    val battleOnly: Boolean = false,
+    /**
+     * When populated by form name(s) in [showdownId] format, overrides the [parentForm] that this form may transform from
+     * (e.g. Necrozma's 'Ultra' from is special can transform from its 'Dawn-Wings' or 'Dusk-Mane forms').
+     */
+    val parentOverrides: List<String> = emptyList(),
+    /** The [TransformationTrigger] to attempt this transformation OUTSIDE of battle. */
+    override val trigger: TransformationTrigger = ItemInteractionTrigger(),
+    /** The [TransformationRequirement]s that need to be satisfied for this transformation OUTSIDE of battle. */
+    override val requirements: Set<TransformationRequirement> = mutableSetOf()
+) : FormData(), Transformation
\ No newline at end of file
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/DamageTakenTransformationProgress.kt b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/DamageTakenTransformationProgress.kt
index 769a7cb1fc..9c28f8b240 100644
--- a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/DamageTakenTransformationProgress.kt
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/DamageTakenTransformationProgress.kt
@@ -12,6 +12,7 @@ import com.cobblemon.mod.common.api.pokemon.transformation.progress.Transformati
 import com.cobblemon.mod.common.api.pokemon.transformation.progress.TransformationProgressType
 import com.cobblemon.mod.common.api.pokemon.transformation.progress.TransformationProgressTypes
 import com.cobblemon.mod.common.pokemon.Pokemon
+import com.cobblemon.mod.common.pokemon.transformation.form.PermanentForm
 import com.cobblemon.mod.common.pokemon.transformation.requirements.DamageTakenRequirement
 import com.cobblemon.mod.common.util.cobblemonResource
 import net.minecraft.resources.ResourceLocation
@@ -60,8 +61,10 @@ class DamageTakenTransformationProgress : TransformationProgress<DamageTakenTran
         }
 
         fun supports(pokemon: Pokemon): Boolean {
-            return pokemon.form.evolutions.any { evolution ->
-                evolution.requirements.any { requirement ->
+            val form = pokemon.form
+            if (form !is PermanentForm) return false
+            return form.transformations.any { transformation ->
+                transformation.requirements.any { requirement ->
                     requirement is DamageTakenRequirement
                 }
             }
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/DefeatTransformationProgress.kt b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/DefeatTransformationProgress.kt
index 4751a1a1ac..95afdc1263 100644
--- a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/DefeatTransformationProgress.kt
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/DefeatTransformationProgress.kt
@@ -13,6 +13,7 @@ import com.cobblemon.mod.common.api.pokemon.transformation.progress.Transformati
 import com.cobblemon.mod.common.api.pokemon.transformation.progress.TransformationProgressType
 import com.cobblemon.mod.common.api.pokemon.transformation.progress.TransformationProgressTypes
 import com.cobblemon.mod.common.pokemon.Pokemon
+import com.cobblemon.mod.common.pokemon.transformation.form.PermanentForm
 import com.cobblemon.mod.common.pokemon.transformation.requirements.DefeatRequirement
 import com.cobblemon.mod.common.util.cobblemonResource
 import net.minecraft.resources.ResourceLocation
@@ -43,8 +44,10 @@ class DefeatTransformationProgress : TransformationProgress<DefeatTransformation
     }
 
     override fun shouldKeep(pokemon: Pokemon): Boolean {
-        return pokemon.form.evolutions.any { evolution ->
-            evolution.requirements.any { requirement ->
+        val form = pokemon.form
+        if (form !is PermanentForm) return false
+        return form.transformations.any { transformation ->
+            transformation.requirements.any { requirement ->
                 requirement is DefeatRequirement && requirement.target.originalString.equals(this.progress.target.originalString, true)
             }
         }
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/LastBattleCriticalHitsTransformationProgress.kt b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/LastBattleCriticalHitsTransformationProgress.kt
index bf1495e181..8189221286 100644
--- a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/LastBattleCriticalHitsTransformationProgress.kt
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/LastBattleCriticalHitsTransformationProgress.kt
@@ -12,6 +12,7 @@ import com.cobblemon.mod.common.api.pokemon.transformation.progress.Transformati
 import com.cobblemon.mod.common.api.pokemon.transformation.progress.TransformationProgressType
 import com.cobblemon.mod.common.api.pokemon.transformation.progress.TransformationProgressTypes
 import com.cobblemon.mod.common.pokemon.Pokemon
+import com.cobblemon.mod.common.pokemon.transformation.form.PermanentForm
 import com.cobblemon.mod.common.pokemon.transformation.requirements.BattleCriticalHitsRequirement
 import com.cobblemon.mod.common.util.cobblemonResource
 import net.minecraft.resources.ResourceLocation
@@ -54,8 +55,10 @@ class LastBattleCriticalHitsTransformationProgress : TransformationProgress<Last
         }
 
         fun supports(pokemon: Pokemon): Boolean {
-            return pokemon.form.evolutions.any { evolution ->
-                evolution.requirements.any { requirement ->
+            val form = pokemon.form
+            if (form !is PermanentForm) return false
+            return form.transformations.any { transformation ->
+                transformation.requirements.any { requirement ->
                     requirement is BattleCriticalHitsRequirement
                 }
             }
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/RecoilTransformationProgress.kt b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/RecoilTransformationProgress.kt
index d09dbea543..2459e9567e 100644
--- a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/RecoilTransformationProgress.kt
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/RecoilTransformationProgress.kt
@@ -12,6 +12,7 @@ import com.cobblemon.mod.common.api.pokemon.transformation.progress.Transformati
 import com.cobblemon.mod.common.api.pokemon.transformation.progress.TransformationProgressType
 import com.cobblemon.mod.common.api.pokemon.transformation.progress.TransformationProgressTypes
 import com.cobblemon.mod.common.pokemon.Pokemon
+import com.cobblemon.mod.common.pokemon.transformation.form.PermanentForm
 import com.cobblemon.mod.common.pokemon.transformation.requirements.RecoilRequirement
 import com.cobblemon.mod.common.util.cobblemonResource
 import com.mojang.serialization.Codec
@@ -60,8 +61,10 @@ class RecoilTransformationProgress : TransformationProgress<RecoilTransformation
         }
 
         fun supports(pokemon: Pokemon): Boolean {
-            return pokemon.form.evolutions.any { evolution ->
-                evolution.requirements.any { requirement ->
+            val form = pokemon.form
+            if (form !is PermanentForm) return false
+            return form.transformations.any { transformation ->
+                transformation.requirements.any { requirement ->
                     requirement is RecoilRequirement
                 }
             }
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/UseMoveTransformationProgress.kt b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/UseMoveTransformationProgress.kt
index d6fd6ebabf..9327471caa 100644
--- a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/UseMoveTransformationProgress.kt
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/progress/UseMoveTransformationProgress.kt
@@ -13,6 +13,7 @@ import com.cobblemon.mod.common.api.pokemon.transformation.progress.Transformati
 import com.cobblemon.mod.common.api.pokemon.transformation.progress.TransformationProgressType
 import com.cobblemon.mod.common.api.pokemon.transformation.progress.TransformationProgressTypes
 import com.cobblemon.mod.common.pokemon.Pokemon
+import com.cobblemon.mod.common.pokemon.transformation.form.PermanentForm
 import com.cobblemon.mod.common.pokemon.transformation.requirements.UseMoveRequirement
 import com.cobblemon.mod.common.util.cobblemonResource
 import net.minecraft.resources.ResourceLocation
@@ -66,8 +67,10 @@ class UseMoveTransformationProgress : TransformationProgress<UseMoveTransformati
         }
 
         fun supports(pokemon: Pokemon, move: MoveTemplate): Boolean {
-            return pokemon.form.evolutions.any { evolution ->
-                evolution.requirements.any { requirement ->
+            val form = pokemon.form
+            if (form !is PermanentForm) return false
+            return form.transformations.any { transformation ->
+                transformation.requirements.any { requirement ->
                     requirement is UseMoveRequirement && requirement.move == move
                 }
             }
diff --git a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/requirements/HeldItemRequirement.kt b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/requirements/HeldItemRequirement.kt
index 14d6bc00ed..254b873dae 100644
--- a/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/requirements/HeldItemRequirement.kt
+++ b/common/src/main/kotlin/com/cobblemon/mod/common/pokemon/transformation/requirements/HeldItemRequirement.kt
@@ -26,7 +26,8 @@ import net.minecraft.world.item.ItemStack
  * @since March 21st, 2022
  */
 class HeldItemRequirement(
-    val itemCondition: NbtItemPredicate = NbtItemPredicate(ItemIdentifierCondition(ResourceLocation.parse("air"))),
+    val itemCondition: NbtItemPredicate =
+        NbtItemPredicate(ItemIdentifierCondition(ResourceLocation.fromNamespaceAndPath("minecraft", "air"))),
     val consumeHeldItem: Boolean? = null
 ) : TransformationRequirement {
 
diff --git a/common/src/main/resources/assets/cobblemon/species.schema.json b/common/src/main/resources/assets/cobblemon/species.schema.json
index 670b990938..87d4841fb6 100644
--- a/common/src/main/resources/assets/cobblemon/species.schema.json
+++ b/common/src/main/resources/assets/cobblemon/species.schema.json
@@ -5,6 +5,10 @@
     "description": "A Pokémon species",
     "type": "object",
     "properties": {
+        "implemented": {
+            "type": "boolean",
+            "default": false
+        },
         "name": {
             "description": "The Pokémon's name",
             "type": "string"
@@ -21,9 +25,12 @@
             "description": "The Pokémon secondary type",
             "type": "string"
         },
-        "maleRatio": {
-            "description": "The Pokémon's gender ratio",
-            "type": ["number", "null"]
+        "abilities": {
+            "description": "The Pokémon's possible abilities",
+            "type": "array",
+            "items": {
+                "type": "string"
+            }
         },
         "baseStats": {
             "description": "The Pokémon's base stats",
@@ -57,6 +64,110 @@
             "description": "The Pokémon's catch rate",
             "type": "integer"
         },
+        "maleRatio": {
+            "description": "The Pokémon's gender ratio",
+            "type": "number"
+        },
+        "baseFriendship": {
+            "description": "The Pokémon's base friendship",
+            "type": "integer"
+        },
+        "experienceGroup": {
+            "description": "The Pokémon's experience group",
+            "type": "string"
+        },
+        "eggCycles": {
+            "description": "The Pokémon's egg cycles",
+            "type": "integer"
+        },
+        "eggGroups": {
+            "description": "The Pokémon's egg group",
+            "type": "string"
+        },
+        "height": {
+            "description": "The Pokémon's Pokédex height in decimeters",
+            "type": "number"
+        },
+        "weight": {
+            "description": "The Pokémon's Pokédex weight in hectograms",
+            "type": "number"
+        },
+        "labels": {
+            "description": "The Pokémon's descriptors",
+            "type": "array",
+            "items": {
+                "type": "string"
+            }
+        },
+        "features": {
+            "description": "The Pokémon's features",
+            "type": "array",
+            "items": {
+                "type": "string"
+            }
+        },
+        "aspects": {
+            "description": "The Pokémon's aspects",
+            "type": "array",
+            "items": {
+                "type": "string"
+            }
+        },
+        "baseExperienceYield": {
+            "description": "The Pokémon's base stats",
+            "type": "object"
+        },
+        "evYield": {
+            "description": "The Pokémon's base stats",
+            "type": "object",
+            "hp": {
+                "description": "The Pokémon's base health stat",
+                "type": "integer"
+            },
+            "attack": {
+                "description": "The Pokémon's base attack stat",
+                "type": "integer"
+            },
+            "defence": {
+                "description": "The Pokémon's base defence stat",
+                "type": "integer"
+            },
+            "specialAttack": {
+                "description": "The Pokémon's base special attack stat",
+                "type": "integer"
+            },
+            "specialDefence": {
+                "description": "The Pokémon's base special defence stat",
+                "type": "integer"
+            },
+            "speed": {
+                "description": "The Pokémon's base speed stat",
+                "type": "integer"
+            }
+        },
+        "drops": {
+            "description": "The items this Pokémon drops on defeat",
+            "type": "object",
+            "amount": {
+                "description": "The maximum number of items this Pokémon may drop",
+                "type": "integer"
+            },
+            "entries": {
+                "description": "The different items that this Pokémon may drop",
+                "type": "array",
+                "items": {
+                    "type": "object",
+                    "item": {
+                        "description": "The ID of the item that is dropped",
+                        "type": "string"
+                    },
+                    "percentage": {
+                        "description": "The chance that this item is one of the items dropped",
+                        "type": "number"
+                    }
+                }
+            }
+        },
         "baseScale": {
             "description": "The Pokémon's base scale",
             "type": "number"
@@ -73,38 +184,233 @@
                 "type": "number"
             },
             "fixed": {
-                "description": "idk",
-                "type": "boolean"
+                "description": "Whether the hitbox is fixed",
+                "type": "boolean",
+                "default": false
             }
         },
+        "battleTheme": {
+            "description": "The ID of the SoundEvent that's played as the Pokémon's encounter theme",
+            "type": "string",
+            "default": "cobblemon:battle.pvw.default"
+        },
+        "dynamaxBlocked": {
+            "description": "Whether the Pokémon is restricted from dynamaxing",
+            "type": "boolean",
+            "default": false
+        },
+        "shoulderMountable": {
+            "description": "The Pokémon's gender ratio",
+            "type": "boolean",
+            "default": false
+        },
+        "behaviour": {
+            "description": "The Pokémon's hitbox",
+            "type": "object",
+            "moving": {
+                "type": "object",
+                "walk": {
+                    "description": "The Pokémon's behaviour when on land",
+                    "type": "object",
+                    "canWalk": {
+                        "description": "Whether the Pokémon can move on land",
+                        "type": "boolean",
+                        "default": true
+                    },
+                    "avoidsLand": {
+                        "description": "Whether the Pokémon seeks the nearest source of water",
+                        "type": "boolean",
+                        "default": false
+                    },
+                    "walkSpeed": {
+                        "description": "The Pokémon's speed while on land",
+                        "type": "number",
+                        "default": 0.35
+                    }
+                },
+                "swim": {
+                    "description": "The Pokémon's behaviour when in liquid",
+                    "type": "object",
+                    "avoidsWater": {
+                        "description": "Whether the Pokémon seeks the nearest source of land",
+                        "type": "boolean",
+                        "default": false
+                    },
+                    "hurtByLava": {
+                        "description": "Whether the Pokémon is damaged in lava",
+                        "type": "boolean",
+                        "default": true
+                    },
+                    "canSwimInWater": {
+                        "description": "Whether the Pokémon can swim in water",
+                        "type": "boolean",
+                        "default": true
+                    },
+                    "canSwimInLava": {
+                        "description": "Whether the Pokémon can swim in lava",
+                        "type": "boolean",
+                        "default": true
+                    },
+                    "canBreatheUnderwater": {
+                        "description": "Whether the Pokémon can breathe in water",
+                        "type": "boolean",
+                        "default": false
+                    },
+                    "canBreatheUnderlava": {
+                        "description": "Whether the Pokémon can breathe in lava",
+                        "type": "boolean",
+                        "default": false
+                    },
+                    "canWalkOnWater": {
+                        "description": "Whether the Pokémon can walk on water",
+                        "type": "boolean",
+                        "default": false
+                    },
+                    "canWalkOnLava": {
+                        "description": "Whether the Pokémon can walk on lava",
+                        "type": "boolean",
+                        "default": false
+                    },
+                    "swimSpeed": {
+                        "description": "The Pokémon's speed while in liquid",
+                        "type": "number",
+                        "default": 0.3
+                    }
+                },
+                "fly": {
+                    "description": "The Pokémon's behaviour when in air",
+                    "type": "object",
+                    "canFly": {
+                        "description": "Whether the Pokémon can move in ar",
+                        "type": "boolean",
+                        "default": false
+                    },
+                    "flySpeedHorizontal": {
+                        "description": "The Pokémon's speed while in air",
+                        "type": "number",
+                        "default": 0.3
+                    }
+                },
+                "canLook": {
+                    "description": "Whether the Pokémon can look at targets",
+                    "type": "boolean",
+                    "default": true
+                },
+                "looksAtEntities": {
+                    "description": "Whether the Pokémon can look at other entities",
+                    "type": "boolean",
+                    "default": true
+                },
+                "wanderChance": {
+                    "description": "The chance that the Pokémon breaks idle state and wanders",
+                    "type": "integer",
+                    "default": 120
+                },
+                "wanderSpeed": {
+                    "description": "The speed that the Pokémon wanders",
+                    "type": "number",
+                    "default": 1.0
+                }
+            },
+            "resting": {
+                "type": "object",
+                "canSleep": {
+                    "description": "Whether the Pokémon can enter a sleeping state",
+                    "type": "boolean",
+                    "default": false
+                },
+                "times": {
+                    "description": "The time of day that the Pokémon can sleep",
+                    "type": "string",
+                    "enum": ["any", "day", "night", "noon", "midnight", "dawn", "dusk", "twilight", "morning", "afternoon"],
+                    "default": "night"
+                },
+                "sleepChance": {
+                    "description": "The chance that the Pokémon enters a sleeping state",
+                    "type": "number",
+                    "default": 0.0016
+                },
+                "blocks": {
+                    "description": "The blocks that the Pokémon can sleep on",
+                    "type": "array",
+                    "items": {
+                        "type": "string"
+                    }
+                },
+                "biomes": {
+                    "description": "The biome that the Pokémon can sleep in",
+                    "type": "array",
+                    "items": {
+                        "type": "string"
+                    }
+                },
+                "light": {
+                    "description": "The light level that the Pokémon can sleep in",
+                    "type": "string",
+                    "default": "0-15"
+                },
+                "depth": {
+                    "description": "How deep the Pokémon sleeps",
+                    "type": "string",
+                    "enum": ["comatose", "normal"],
+                    "default": "normal"
+                },
+                "willSleepOnBed": {
+                    "description": "Whether the Pokémon can sleep on a bed",
+                    "type": "boolean"
+                }
+            },
+            "idle": {
+                "type": "object",
+                "pointsAtSpawn": {
+                    "description": "Whether the Pokémon looks towards world spawn",
+                    "type": "boolean",
+                    "default": false
+                }
+            }
+        },
+        "moves": {
+            "description": "The Pokémon's learnset",
+            "type": "array",
+            "items": {
+                "type": "string"
+            }
+        },
+        "preEvolution": {
+            "description": "The Pokémon's pre-evolved form",
+            "type": "string"
+        },
         "evolutions": {
             "description": "The Pokémon's evolutions",
             "type": "array",
             "items": {
                 "type": "object",
-                "variant": {
-                    "description": "The ID of the event that attempts to start an evolution",
-                    "type": "string",
-                    "enum": ["level_up", "trade", "item_interact"]
-                },
                 "id": {
-                    "description": "An unique ID for this evolution, IE pikachu_level",
+                    "description": "A unique ID for this evolution (i.e. nosepass_probopass)",
                     "type": "string"
                 },
                 "result": {
                     "description": "The PokemonProperties that represents the result of this evolution",
                     "type": "string"
                 },
-                "optional": {
-                    "description": "If this evolution will allow the user to choose when to start it or not",
-                    "type": "boolean"
+                "learnableMoves": {
+                    "description": "The moves learnt after evolution",
+                    "type": "array",
+                    "items": {
+                        "type": "string"
+                    }
                 },
-                "consumeHeldItem": {
-                    "description": "If this evolution will consume the held item",
-                    "type": "boolean"
-                },
-                "data": {
-                    "description": "The data that backs this event"
+                "trigger": {
+                    "type": ["object", "string"],
+                    "variant": {
+                        "description": "The ID of the event that attempts to start this evolution",
+                        "type": "string",
+                        "enum": ["level_up", "trade", "item_interact", "block_click"]
+                    },
+                    "requiredContext": {
+                        "description": "The context required to kick-start this evolution",
+                        "type": "string"
+                    }
                 },
                 "requirements": {
                     "description": "The requirements behind this evolution",
@@ -120,12 +426,27 @@
                             "description": "The data that backs this requirement"
                         }
                     }
+                },
+                "optional": {
+                    "description": "If this evolution will allow the user to choose when to start it or not",
+                    "type": "boolean",
+                    "default": true
                 }
             }
         },
-        "battleTheme": {
-            "description": "The SoundEvent ID for the theme to play when encountering a wild Pokémon of this species",
-            "type": "string"
+        "temporaryForms": {
+            "description": "The interchangeable forms of this Pokémon",
+            "type": "array",
+            "items": {
+                "type": "object"
+            }
+        },
+        "permanentForms": {
+            "description": "The non-interchangeable forms of this Pokémon",
+            "type": "array",
+            "items": {
+                "type": "object"
+            }
         }
     }
   }
\ No newline at end of file