Quoted By:
New ability: Blunder Guard
Grants immunity to super effective moves.
Also, both Wonder Guard and Blunder Guard can protect from chip damage based on type.
Burn is fire type, poison is poison, SR and sandstorm are rock, hail is ice, spikes are ground, curse is ghost, recoil is based on whatever type the move was, etc.
The idea is that a WG Shedinja and a BG Shedinja can never take damage from the same thing. Peak mindgames.