In X and Y, there is a Pokemon named Agislash. He has a signature ability called Stance Change. It has a description that says: "The Pokemon changes form depending on how it battles." What exactly does that mean? Does it swap Offensive Capabilities with Defensive?
How does Stance Change work on Aegislash
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Best Answer
Aegislash changes form dependant upon the moves it uses.
If Aegislash uses the move King's Shield, or enters the battle, it goes to Shield Forme. Shield Forme has higher defense and lower attack.
If Aegislash uses a damaging move, it goes to Blade Forme, swapping its base Attack with it's Defense, causing it to have a higher Attack and lower defense.
From Serebii:
It's also note-worthy that moves that call other moves do not change Aegislash's form, even if they call a damaging move.
From Bulbapedia:
Stance Change is activated independently of sleep or confusion, and will therefore cause a change in stance even if Aegislash is affected by either status. It can also not be traced, copied with Role Play, suppressed with Gastro Acid, or replaced with Simple Beam, Worry Seed, Entrainment, or Skill Swap. Obtaining Stance Change through Imposter will not allow the other Pokemon to transform.