Ignore ability in Tera Blast stat check.

data/moves.ts

@@ -19954,9 +19954,21 @@ export const Moves: {[moveid: string]: MoveData} = {
  }
  },
  onModifyMove(move, pokemon) {
- if (pokemon.terastallized && pokemon.getStat('atk', false, true) > pokemon.getStat('spa', false, true)) {
+ if (!pokemon.terastallized) return;
+
+ // When checking the attacker's stats to determine move category, ignore abilities that
+ // change the stat stage boosts at calculation time. This will not ignore abilities whose
+ // stat stage changes have already been applied to the boost table.
+ const originalIgnoreAbility = move.ignoreAbility;
+ move.ignoreAbility = true;
+ const unModifiedAtk = pokemon.getStat('atk', false, true);
+ const unModifiedSpAtk = pokemon.getStat('spa', false, true);
+ // Reset the move so that the target's abilities will be applied in damage calculation.
+ move.ignoreAbility = originalIgnoreAbility;
+ if (unModifiedAtk > unModifiedSpAtk) {
  move.category = 'Physical';
  }
+
  if (pokemon.terastallized === 'Stellar') {
  move.self = {boosts: {atk: -1, spa: -1}};
  }

test/sim/moves/terablast.js

@@ -45,8 +45,7 @@ describe('Tera Blast', function () {
  assert.equal(battle.p1.pokemon[0].lastMove.category, 'Special');
  });
 
- // Skipped until https://github.com/smogon/pokemon-showdown/issues/9381 is fixed.
- it.skip(`should be a special attack when terastallized even if target ignores stat changes`, function () {
+ it(`should be a special attack when terastallized even if target ignores stat changes`, function () {
  const battle = common.createBattle([[
  // Regidrago has equal base attack and special attack stats.
  {species: 'regidrago', ability: 'dragonsmaw', moves: ['terablast', 'dragondance']},