It works extremely well with Arena and is a good way to learn how building affects gameplay in the format since you can see the deck during the game
Mewtwo EX x2 (Genetic Apex 129) Raltz x2 (Genetic Apex 130) Kirlia x2 (Genetic Apex 131) Gardevoir x2 (Genetic Apex 132) X Speed x2 (Promo-A 002) Poke Ball x2 (Promo-A 005) Professors Research x2 (Promo-A 007) Next, here is a list of non-essential cards which, while not a core part of the Mewtwo EX deck, can greatly increase your odds of success and grant you new gameplay opportunities
2 Persistent Petitioners Just Need You To Sign Here, And Here, And Here
A great option for tribal draw, both yours if you're playing a tribal deck, or an opponent's if they're tribe heavy, since you don't have to name your own tribe
Frequently resulting in scratched heads and judges being called, these cards are definitely a lot to deal with