Put as many damage counters as you like on Banette. (You can't put more than Banette's remaining HP.) Put that many damage counters on the Defending Pokémon.

Spiteful Pain40+

If Banette is in your discard pile, this attack does 40 damage plus 40 more damage, then search your discard pile for Banette, show it to your opponent, and shuffle it into your deck.