Stance Change (ability)
Stance Change is exclusive to Aegislash. When using a damage-dealing move, Aegislash switches to its Blade Forme. When using the move King's Shield, Aegislash switches to its Shield Forme.
The form change occurs when the appropriate move is selected, regardless of whether the attack goes ahead (e.g. prevented by paralysis).
|X/Y||The Pokémon changes form depending on how it battles.|