Feraligatr

It usually moves slowly, but it goes at blinding speed when it attacks and bites prey.

Hyper Whirlpool (60): Flip a coin until you get tails. For each heads, discard an Energy attached to your opponent's Active Pokémon.

Second Strike (80+): If your opponent's Active Pokémon already has any damage counters on it, this attack does 80 more damage.