Budew

Prevent all effects of attacks, including damage, done to Budew by your opponent's Poisoned Pokémon.

Once during your turn (before your attack), you may put Roselia from your hand onto Budew (this counts as evolving Budew) and remove all damage counters from Budew.

Search your deck for a Pokémon, show it to your opponent, and put it into your hand. Shuffle your deck afterward.