diff --git a/src/data/ability.ts b/src/data/ability.ts
index a8b0926e1c9..01e99966ff8 100644
--- a/src/data/ability.ts
+++ b/src/data/ability.ts
@@ -2453,15 +2453,19 @@ export class PostSummonTransformAbAttr extends PostSummonAbAttr {
       pokemon.setStatStage(s, target.getStatStage(s));
     }
 
-    pokemon.summonData.moveset = target.getMoveset().map(m => {
-      const pp = m?.getMove().pp ?? 0;
-      // If PP value is less than 5, do nothing. If greater, we need to reduce the value to 5.
-      return new PokemonMove(m?.moveId!, 0, 0, false, Math.min(pp, 5));
+    pokemon.summonData.moveset = target.getMoveset().map((m) => {
+      if (m) {
+        // If PP value is less than 5, do nothing. If greater, we need to reduce the value to 5.
+        return new PokemonMove(m.moveId, 0, 0, false, Math.min(m.getMove().pp, 5));
+      } else {
+        console.warn(`Imposter: somehow iterating over a ${m} value when copying moveset!`);
+        return new PokemonMove(Moves.NONE);
+      }
     });
     pokemon.summonData.types = target.getTypes();
     promises.push(pokemon.updateInfo());
 
-    pokemon.scene.queueMessage(i18next.t("abilityTriggers:postSummonTransform", { pokemonNameWithAffix: getPokemonNameWithAffix(pokemon), targetName: target!.name, }));
+    pokemon.scene.queueMessage(i18next.t("abilityTriggers:postSummonTransform", { pokemonNameWithAffix: getPokemonNameWithAffix(pokemon), targetName: target.name, }));
     pokemon.scene.playSound("battle_anims/PRSFX- Transform");
     promises.push(pokemon.loadAssets(false).then(() => {
       pokemon.playAnim();
diff --git a/src/data/move.ts b/src/data/move.ts
index f872224af8a..9979b24cc24 100644
--- a/src/data/move.ts
+++ b/src/data/move.ts
@@ -6668,10 +6668,14 @@ export class TransformAttr extends MoveEffectAttr {
       user.setStatStage(s, target.getStatStage(s));
     }
 
-    user.summonData.moveset = target.getMoveset().map(m => {
-      const pp = m?.getMove().pp ?? 0;
-      // If PP value is less than 5, do nothing. If greater, we need to reduce the value to 5.
-      return new PokemonMove(m?.moveId!, 0, 0, false, Math.min(pp, 5));
+    user.summonData.moveset = target.getMoveset().map((m) => {
+      if (m) {
+        // If PP value is less than 5, do nothing. If greater, we need to reduce the value to 5.
+        return new PokemonMove(m.moveId, 0, 0, false, Math.min(m.getMove().pp, 5));
+      } else {
+        console.warn(`Transform: somehow iterating over a ${m} value when copying moveset!`);
+        return new PokemonMove(Moves.NONE);
+      }
     });
     user.summonData.types = target.getTypes();
     promises.push(user.updateInfo());
diff --git a/src/field/pokemon.ts b/src/field/pokemon.ts
index addb0679d19..a708b2067a7 100644
--- a/src/field/pokemon.ts
+++ b/src/field/pokemon.ts
@@ -4431,7 +4431,7 @@ export class PlayerPokemon extends Pokemon {
           this.scene.removePartyMemberModifiers(fusedPartyMemberIndex);
           this.scene.getParty().splice(fusedPartyMemberIndex, 1)[0];
           const newPartyMemberIndex = this.scene.getParty().indexOf(this);
-          pokemon.getMoveset(true).map(m => this.scene.unshiftPhase(new LearnMovePhase(this.scene, newPartyMemberIndex, m!.getMove().id))); // TODO: is the bang correct?
+          pokemon.getMoveset(true).map((m: PokemonMove) => this.scene.unshiftPhase(new LearnMovePhase(this.scene, newPartyMemberIndex, m.getMove().id)));
           pokemon.destroy();
           this.updateFusionPalette();
           resolve();
@@ -4452,8 +4452,12 @@ export class PlayerPokemon extends Pokemon {
   /** Returns a deep copy of this Pokemon's moveset array */
   copyMoveset(): PokemonMove[] {
     const newMoveset : PokemonMove[] = [];
-    this.moveset.forEach(move =>
-      newMoveset.push(new PokemonMove(move!.moveId, 0, move!.ppUp, move!.virtual, move!.maxPpOverride))); // TODO: are those bangs correct?
+    this.moveset.forEach((move) => {
+      // TODO: refactor `moveset` to not accept `null`s
+      if (move) {
+        newMoveset.push(new PokemonMove(move.moveId, 0, move.ppUp, move.virtual, move.maxPpOverride));
+      }
+    });
 
     return newMoveset;
   }
@@ -5190,11 +5194,11 @@ export class PokemonMove {
    */
   public maxPpOverride?: number;
 
-  constructor(moveId: Moves, ppUsed?: number, ppUp?: number, virtual?: boolean, maxPpOverride?: number) {
+  constructor(moveId: Moves, ppUsed: number = 0, ppUp: number = 0, virtual: boolean = false, maxPpOverride?: number) {
     this.moveId = moveId;
-    this.ppUsed = ppUsed || 0;
-    this.ppUp = ppUp || 0;
-    this.virtual = !!virtual;
+    this.ppUsed = ppUsed;
+    this.ppUp = ppUp;
+    this.virtual = virtual;
     this.maxPpOverride = maxPpOverride;
   }