Butterfree

The poison scales on its wings are waterproof, allowing this Pokémon to be active even on rainy days.

Fly (30): Flip a coin. If heads, during your opponent's next turn, prevent all effects of attacks, including damage, done to Butterfree. If tails, this attack does nothing (not even damage).

Rainbow Powder (20): Flip a coin. If heads, the Defending Pokémon is now Paralyzed. If tails, the Defending Pokémon is now Poisoned.