Steelix 035 Aquapolis - Rare Condition:Near Mint Weakness Psychic ×2

Weakness Psychic ×2

FormStage 1 - Evolves from Shellder

switch Marshtomp with that Active Pokémon

or anything else that might be the result of an attack (just as if you had evolved it)

Steelix 035 Aquapolis - Rare Condition:Near Mint Weakness Psychic ×2RarityRare Card TypePokmon Hit Points100 HP FormStage 1 Evolves from Onix TypeMetal Colorless,Colorless Earth Rift (10) This attack does 10 damage to each of your opponent's Benched Pokmon. (Don't apply Weakness or Resistance for Benched Pokmon.) Then, flip a coin. If tails, this attack can't be used during your next turn. Metal,Metal,Colorless,Colorless Iron Smash (50+) Flip 2 coins. If both are heads, this attack does 50 damage plus 20 more damage.