Plusle.

Poké-PowerPlus Charge

Once during your turn (before your attack), if any of your Pokémon were Knocked Out during your opponent's last turn, you may search your discard pile for up to 2 basic Energy cards, show them to your opponent, and put them into your hand. You can't use more than 1 Plus Charge Poké-Power each turn. This power can't be used if Plusle is affected by a Special Condition.