Mew ex can use the attacks of all PokÃ©mon in play as its own. (You still need the necessary Energy to use each attack.)
Search your deck for an Energy card and attach it to Mew ex. Shuffle your deck afterward. Then, you may switch Mew ex with 1 of your Benched PokÃ©mon.
When PokÃ©mon-ex has been Knocked Out, your opponent takes 2 Prize cards.