Gardevoir & Sylveon GX (Secret) #225/214

Fairy Song

Search your deck for up to 2 Fairy Energy cards and attach them to your Benched Pokemon in any way you like. Then, shuffle your deck.

Kaleidostorm150

Move any number of Energy from your Pokemon to your other Pokemon in any way you like.

If this Pokemon has at least 3 extra Fairy Energy attached to it (in addition to this attack's cost), your opponent shuffles their hand into their deck. (You can't use more than 1 GX attack in a game.)