Once during your turn, you may search your deck for a Single Strike Energy card and attach it to 1 of your Single Strike Pokémon. Then, shuffle your deck. If you attached Energy to a Pokémon in this way, put 2 damage counters on that Pokémon.
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.