As Long as Cradily is your Active Pokémon, your opponent's Pokémon can't Retreat.
Attack: Lure Poison
Damage: 10
Before using this effect, you may switch the Defending Pokémon with 1 of your opponent's Benched Pokémon, if any. The Defending Pokémon is now Poisoned.
Attack: Spiral Drain
Damage: 50
Remove 2 damage counters from Cradily (remove 1 if there is only 1).