Discard the top card of your deck, and if that card is a Pokémon that doesn't have a Rule Box, choose 1 of its attacks and use it as this attack. (Pokémon ex, Pokémon V, etc. have Rule Boxes.)
I ordered 3 tins, and they made sure to send 3 different designs, thanks! Sadly 1 tin did arrive with a dent in it. It also took almost a week to be shipped.