foul play

Suppose Player A has a Buzzwole (FLI 77). Both players have 4 prizes remaining, and Sledgehammer knocks out Player B's active Pokémon-GX by doing 120 damage, taking Player A to 2 prizes remaining. Player B then promotes Mimikyu (GRI 58) and announces Copycat. Whose prize cards are considered...

I'm hoping to better understand the logic between two rulings in the compendium. Two rulings from the Compendium: ========= 1 ========= - If a Pokémon attack copies another attack that says "discard all [X] Energy", then you must be able to discard at least one energy card of that type in...