diff --git a/src/battle-phases.ts b/src/battle-phases.ts
index f3b5a0f4e06..4074a694dc2 100644
--- a/src/battle-phases.ts
+++ b/src/battle-phases.ts
@@ -111,6 +111,8 @@ export class SelectStarterPhase extends BattlePhase {
         const starterPokemon = new PlayerPokemon(this.scene, starter.species, startingLevel, starter.abilityIndex, starter.formIndex, starterGender, starter.shiny);
         if (starter.pokerus)
           starterPokemon.pokerus = true;
+        if (this.scene.gameMode === GameMode.SPLICED_ENDLESS)
+          starterPokemon.generateFusionSpecies(true);
         starterPokemon.setVisible(false);
         party.push(starterPokemon);
         loadPokemonAssets.push(starterPokemon.loadAssets());
@@ -245,7 +247,7 @@ export class EncounterPhase extends BattlePhase {
         if (battle.battleType === BattleType.TRAINER)
           battle.enemyParty[e] = battle.trainer.genPartyMember(e);
         else {
-          const enemySpecies = this.scene.randomSpecies(battle.waveIndex, level, null, true);
+          const enemySpecies = this.scene.randomSpecies(battle.waveIndex, level, true);
           battle.enemyParty[e] = new EnemyPokemon(this.scene, enemySpecies, level, false);
         }
       }
diff --git a/src/battle-scene.ts b/src/battle-scene.ts
index cc1e624462c..c17bbb1d4a9 100644
--- a/src/battle-scene.ts
+++ b/src/battle-scene.ts
@@ -456,7 +456,7 @@ export default class BattleScene extends Phaser.Scene {
 
 		if (this.quickStart) {
 			for (let s = 0; s < 3; s++) {
-				const playerSpecies = this.randomSpecies(startingWave, startingLevel, null, false);
+				const playerSpecies = this.randomSpecies(startingWave, startingLevel);
 				const playerPokemon = new PlayerPokemon(this, playerSpecies, startingLevel, 0, 0);
 				playerPokemon.setVisible(false);
 				this.party.push(playerPokemon);
@@ -815,15 +815,20 @@ export default class BattleScene extends Phaser.Scene {
 		return Math.min(Math.ceil(baseLevel / 2) * 2 + 2, 10000);
 	}
 
-	randomSpecies(waveIndex: integer, level: integer, speciesFilter?: PokemonSpeciesFilter, fromArenaPool?: boolean): PokemonSpecies {
+	randomSpecies(waveIndex: integer, level: integer, fromArenaPool?: boolean, speciesFilter?: PokemonSpeciesFilter, filterAllEvolutions?: boolean): PokemonSpecies {
 		if (fromArenaPool)
 			return this.arena.randomSpecies(waveIndex, level);
 		const filteredSpecies = speciesFilter ? [...new Set(allSpecies.slice(0, -1).filter(speciesFilter).map(s => {
-			while (pokemonPrevolutions.hasOwnProperty(s.speciesId))
-				s = getPokemonSpecies(pokemonPrevolutions[s.speciesId]);
+			if (!filterAllEvolutions) {
+				while (pokemonPrevolutions.hasOwnProperty(s.speciesId))
+					s = getPokemonSpecies(pokemonPrevolutions[s.speciesId]);
+			}
 			return s;
 		}))] : allSpecies.slice(0, -1);
-		return getPokemonSpecies(filteredSpecies[Utils.randSeedInt(filteredSpecies.length)].getSpeciesForLevel(level, true));
+		let ret = filteredSpecies[Utils.randSeedInt(filteredSpecies.length)];
+		if (!filterAllEvolutions)
+			ret = getPokemonSpecies(ret.getSpeciesForLevel(level, true));
+		return ret;
 	}
 
 	checkInput(): boolean {
diff --git a/src/data/trainer-type.ts b/src/data/trainer-type.ts
index 29df2ed18be..8056f23ba9e 100644
--- a/src/data/trainer-type.ts
+++ b/src/data/trainer-type.ts
@@ -531,7 +531,7 @@ function getSpeciesFilterRandomPartyMemberFunc(speciesFilter: PokemonSpeciesFilt
   const originalSpeciesFilter = speciesFilter;
   speciesFilter = (species: PokemonSpecies) => allowLegendaries || (!species.legendary && !species.pseudoLegendary && !species.mythical) && originalSpeciesFilter(species);
   return (scene: BattleScene, level: integer) => {
-    const ret = new EnemyPokemon(scene, scene.randomSpecies(scene.currentBattle.waveIndex, level, speciesFilter), level, true);
+    const ret = new EnemyPokemon(scene, scene.randomSpecies(scene.currentBattle.waveIndex, level, false, speciesFilter), level, true);
     if (postProcess)
       postProcess(ret);
     return ret;
diff --git a/src/pokemon.ts b/src/pokemon.ts
index 990a0000940..0803b53defe 100644
--- a/src/pokemon.ts
+++ b/src/pokemon.ts
@@ -154,22 +154,8 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
       this.winCount = 0;
       this.pokerus = false;
 
-      if (scene.gameMode === GameMode.SPLICED_ENDLESS) {
-        this.fusionSpecies = scene.randomSpecies(scene.currentBattle?.waveIndex || 0, level, this.species.getCompatibleFusionSpeciesFilter(), false);
-        this.fusionAbilityIndex = (this.fusionSpecies.abilityHidden && hasHiddenAbility ? this.fusionSpecies.ability2 ? 2 : 1 : this.fusionSpecies.ability2 ? randAbilityIndex : 0);
-        this.fusionFormIndex = scene.getSpeciesFormIndex(this.fusionSpecies);
-        this.fusionShiny = this.shiny;
-        
-        if (this.getFusionSpeciesForm().malePercent === null)
-          this.fusionGender = Gender.GENDERLESS;
-        else {
-          const genderChance = (this.id % 256) * 0.390625;
-          if (genderChance < this.getFusionSpeciesForm().malePercent)
-            this.fusionGender = Gender.MALE;
-          else
-            this.fusionGender = Gender.FEMALE;
-        }
-      }
+      if (scene.gameMode === GameMode.SPLICED_ENDLESS)
+        this.generateFusionSpecies();
     }
 
     if (!species.isObtainable())
@@ -597,6 +583,39 @@ export default abstract class Pokemon extends Phaser.GameObjects.Container {
     return this.shiny;
   }
 
+  generateFusionSpecies(forStarter?: boolean): void {
+    const hiddenAbilityChance = new Utils.IntegerHolder(256);
+    if (!this.hasTrainer())
+      this.scene.applyModifiers(HiddenAbilityRateBoosterModifier, true, hiddenAbilityChance);
+
+    const hasHiddenAbility = !Utils.randSeedInt(hiddenAbilityChance.value);
+    const randAbilityIndex = Utils.randSeedInt(2);
+
+    const filter = !forStarter ? this.species.getCompatibleFusionSpeciesFilter()
+    : species => {
+      return pokemonEvolutions.hasOwnProperty(species.speciesId)
+      && !pokemonPrevolutions.hasOwnProperty(species.speciesId)
+      && !species.pseudoLegendary
+      && !species.legendary
+      && !species.mythical
+    };
+   
+    this.fusionSpecies = this.scene.randomSpecies(this.scene.currentBattle?.waveIndex || 0, this.level, false, filter, true);
+    this.fusionAbilityIndex = (this.fusionSpecies.abilityHidden && hasHiddenAbility ? this.fusionSpecies.ability2 ? 2 : 1 : this.fusionSpecies.ability2 ? randAbilityIndex : 0);
+    this.fusionFormIndex = this.scene.getSpeciesFormIndex(this.fusionSpecies);
+    this.fusionShiny = this.shiny;
+    
+    if (this.getFusionSpeciesForm().malePercent === null)
+      this.fusionGender = Gender.GENDERLESS;
+    else {
+      const genderChance = (this.id % 256) * 0.390625;
+      if (genderChance < this.getFusionSpeciesForm().malePercent)
+        this.fusionGender = Gender.MALE;
+      else
+        this.fusionGender = Gender.FEMALE;
+    }
+  }
+
   generateAndPopulateMoveset(): void {
     this.moveset = [];
     const movePool = [];
diff --git a/src/trainer.ts b/src/trainer.ts
index a2e67412696..9c1dc58ebf3 100644
--- a/src/trainer.ts
+++ b/src/trainer.ts
@@ -153,7 +153,7 @@ export default class Trainer extends Phaser.GameObjects.Container {
       const tierPool = this.config.speciesPools[tier];
       ret = getPokemonSpecies(getPokemonSpecies(Phaser.Math.RND.pick(tierPool)).getSpeciesForLevel(level, true));
     } else
-      ret = getPokemonSpecies(this.scene.randomSpecies(battle.waveIndex, level, this.config.speciesFilter).getSpeciesForLevel(level));
+      ret = getPokemonSpecies(this.scene.randomSpecies(battle.waveIndex, level, false, this.config.speciesFilter).getSpeciesForLevel(level));
 
     if (template.isBalanced(battle.enemyParty.length)) {
       const partyMemberTypes = battle.enemyParty.map(p => p.getTypes()).flat();