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You can combine with this card's effect that gains memory when a security card is removed, so this Digimon is an excellent choice for a wide range of strategies

The strength is that you can use this effect in the opponents battle phase too before the opponent attacks, so if you get a fast summon with escape from the dark dimension or its own effect this can be a good counter

While it isnt gonna be a tech in many decks, like Lillies Clefairy ex [Journey Together], Team Rockets Mewtwo ex seems to be a unique offering to the competitive landscape as a Team Rockets featured archetype on its own - even Tord Reklev played it to a Champions League in Japan