What it does
Stance Change exists only on Aegislash. When it enters the field, it starts in Shield Forme — Defense and Special Defense at 150, Attack and Special Attack at 50. The moment it selects an attacking move, it shifts to Blade Forme before the move executes: Attack and Special Defense each hit 150, while defenses drop to 50. Using King’s Shield or switching out immediately resets it to Shield Forme.
The numbers are not subtle. A 150/150 bulk wall on entry can absorb almost anything. A 150/150 attacker on offense is a genuine threat. The catch is that you never have both at once — you are either tanking or hitting, and the opponent knows which phase is coming based on what you do.
King’s Shield is what makes the cycle work. It is not just a Protect variant — if a contact move hits Aegislash while King's Shield is active, the attacker's Attack drops by 2 stages. That penalty is severe enough to make physical contact attackers reconsider the plan entirely.
Ghost/Steel typing handles the rest: immune to Normal, Fighting, and Poison moves before any ability interaction, plus a long list of resistances. A lot of the meta's standard hitting options just do not land on Aegislash cleanly.
Who runs it
Aegislash is the only Pokémon with Stance Change — it is inseparable from the Pokémon itself. Champions data shows 100% of Aegislash running it, which makes sense: the ability is not a choice, it is the identity.
How to use it
The standard loop: switch in (Shield Forme absorbs a hit), select an attack next turn (flip to Blade, deal damage), then use King’s Shield to reset back to Shield Forme. Repeat. The opponent has to constantly decide whether to hit you in Shield phase, bait the King's Shield, or try to work around the cycle entirely.
The decision each turn is: attack or protect. Against a fast physical attacker, lead with King’s Shield to bait the contact move and trigger the -2 Attack drop before you start hitting. Against special attackers or obvious switches, skip the protection and go straight into the offensive cycle — do not waste a turn shielding when there is nothing to bait.
Shadow Ball and Flash Cannon are the two core offensive types, covering different parts of the meta. Sacred Sword is the physical Fighting option that bypasses stat boosts — it ignores Defense and Special Defense raises, which is relevant against setup sweepers.
Tips & strategy
In doubles, the timing question gets sharper. You want a partner that clears the threats Aegislash cannot tank in Blade Forme while it sets up the offensive cycle. Switching Aegislash in to absorb a hit in Shield Forme while your partner handles the other slot is a clean way to get it into position safely.
Once opponents understand the pattern, they will try to hit Blade Forme with special moves or use status and utility moves during Shield phase. Mix up the timing — occasionally use King’s Shield from Blade Forme to break their read, or go an extra offensive turn without resetting when you have the HP to absorb the incoming hit.
Forced switches — from phazing moves or abilities — reset Aegislash to Shield Forme. That is usually a disruption to your plan, but sometimes it is free defensive positioning when you needed to reset anyway.