Blocking Is a function that can be activated by default by pressing R. It allows you to block some attacks and even some burst attacks. It should be noted however that some attacks can still slightly damage you if your blocking, you cannot faint from this however as you will always survive on 1HP when taking block damage. Some attacks and burst attacks can pierce blocks, notable examples include all of Chandelure's Pokémon moves and Gengar's Shadow Drop. You take no damage from counter attacks when blocking but Grabs can bypass your block. Continuously blocking could break the shield, therefore making you vulnerable.