Damp prevents all Pokémon currently in battle from using explosive moves such as Self-Destruct, Explosion, Mind Blown, and Misty Explosion; if a Pokémon attempts to use one of these moves, it will fail and the user will not faint or take damage. Additionally, Damp prevents the Ability Aftermath from doing damage when the Pokémon with Aftermath faints.
Blasts from things like the move Explosion, Blast Trap, or Big Blast Trap will not go off.* No moves like Explosion or traps like Blast Trap and Big Blast Trap will work while the Pokémon is on the floor!*
If the opponent tries to use an explosive move near Poliwrath, smoke will rise from the opponent, but no explosion happens. The opponent also gets knocked out.
If the opponent tries to use an explosive move near Defense Forme Deoxys, the opponent with start to glow brightly, and so will Defense Forme Deoxys's core. The opponent then stops glowing and it cannot explode.