Each Pokémon that has any damage counters on it (both yours and your opponent's) can't use any Poké-Powers.

Gigavolt

30+

Flip a coin. If heads, this attack does 30 damage plus 30 more damage. If tails, the Defending Pokémon is now Paralyzed.

Reflect Energy

70

Move an Energy card attached to Ampharos to 1 of your Benched Pokémon.