You are probably familiar with the fact that Pokmon sets follow certain themes or eras
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The trade-off is that you'll be returning an attacking creature to your hand to cast it for this cost
According to Verhey, the card was banned because of the potential for players to imprint an extra turn spell for an easy (and frustrating) win, or just something that creates an 'unfun' situation and stops the game moving forward, like a board wipe every turn
Another attacker we can use in this deck is a1a-32-mew-ex, copying the opponent's attack with Genome Hacking, perfect if your opponent's Pokemon has a high damage attack to copy
The interesting part is the middle effect, which creates a 2/2 (functionally a 3/3) Pirate whenever cards leave your graveyard