Implement mega evolutions

src/data/move.ts

@@ -4106,7 +4106,8 @@ export function initMoves() {
       .target(MoveTarget.ALL_NEAR_ENEMIES),
     new AttackMove(Moves.PRECIPICE_BLADES, "Precipice Blades (N)", Type.GROUND, MoveCategory.PHYSICAL, 120, 85, 10, -1, "The user attacks opposing Pokémon by manifesting the power of the land in fearsome blades of stone.", -1, 0, 6)
       .target(MoveTarget.ALL_NEAR_ENEMIES),
-    new AttackMove(Moves.DRAGON_ASCENT, "Dragon Ascent (N)", Type.FLYING, MoveCategory.PHYSICAL, 120, 100, 5, -1, "After soaring upward, the user attacks its target by dropping out of the sky at high speeds. But it lowers its own Defense and Sp. Def stats in the process.", 100, 0, 6),
+    new AttackMove(Moves.DRAGON_ASCENT, "Dragon Ascent", Type.FLYING, MoveCategory.PHYSICAL, 120, 100, 5, -1, "After soaring upward, the user attacks its target by dropping out of the sky at high speeds. But it lowers its own Defense and Sp. Def stats in the process.", 100, 0, 6)
+      .attr(StatChangeAttr, [ BattleStat.DEF, BattleStat.SPDEF ], -1),
     new AttackMove(Moves.HYPERSPACE_FURY, "Hyperspace Fury (N)", Type.DARK, MoveCategory.PHYSICAL, 100, -1, 5, -1, "Using its many arms, the user unleashes a barrage of attacks that ignore the effects of moves like Protect and Detect. But the user's Defense stat falls.", 100, 0, 6),
     /* Unused */
     new AttackMove(Moves.BREAKNECK_BLITZ__PHYSICAL, "Breakneck Blitz (N)", Type.NORMAL, MoveCategory.PHYSICAL, -1, -1, 1, -1, "The user builds up its momentum using its Z-Power and crashes into the target at full speed. The power varies, depending on the original move.", -1, 0, 7),