HS—Undaunted set of HeartGold & SoulSilver series

Muk
Stage 1
HP100
Evolves From: Grimer
Pokédex No.89
Sludge Drag
Switch the Defending Pokémon with 1 of your opponent's Benched Pokémon. The new Defending Pokémon is now Confused and Poisoned.
Pester
If the Defending Pokémon is affected by a Special Condition, this attack does 50 damage plus 30 more damage.