Frasier says, "The vibe is to understand them as brothers and see how important that is to their family." Donatello and Leonardo are the more serious and studious brothers, so you'll see them on a team-up card, while Raphael and Michelangelo are the troublemakers, and that's reflected in their team-up card, too
That said, if you're looking for a guaranteed way to get your hands on artist Magali Villeneuve's beautiful renditions of these FF7 characters, the Starter Kit could be worth it
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If another creature enters the battlefield as or becomes a copy of Pirated Copy, it will copy whatever Pirated Copy is copying, be a Pirate in addition to its other types, and have "Whenever this creature or another creature with the same name deals combat damage to a player, you draw a card." (2022-12-02) If Pirated Copy doesn't enter the battlefield as a creature (such as by copying an artifact or land that became a creature), it doesn't become a Pirate, though it still has the granted triggered ability