Tyranitar

Its body can't be harmed by any sort of attack, so it is very eager to make challenges against enemies.

Slam (30x): Flip 2 coins. This attack does 30 times the number of heads.

Trample (50): For each Benched Pokémon in play (yours and your opponent's), flip a coin. If heads, this attack does 30 damage to that Pokémon. (Don't apply Weakness and Resistance for Benched Pokémon.)