Collector Boosters / Booster Display Ready to supercharge
3 Chaos, the Endless Cid, Timeless Artificer Cloud of Darkness Diamond Weapon Exdeath, Void Warlock Fang, Fearless l'Cie Freya Crescent G'raha Tia Gaius van Baelsar Garland, Knight of Cornelia Garnet, Princess of Alexandria Giott, King of the Dwarves Gladiolus Amicitia Ignis Scientia Judge Magister Gabranth Locke Cole Neo Exdeath, Dimension's End Omega, Heartless Evolution Prompto Argentum Queen Brahne Quina, Qu Gourmet Quistis Trepe Ragnarok, Divine Deliverance Reno and Rude Ring of the Lucii Rinoa Heartilly Rufus Shinra Rydia, Summoner of Mist Shantotto, Tactician Magician Snow Villiers The Emperor of Palamecia The Lord Master of Hell The Prima Vista Tidus, Blitzball Star Torgal, A Fine Hound Ultimecia, Omnipotent Ultimecia, Time Sorceress Ultros, Obnoxious Octopus Vanille, Cheerful l'Cie World Champion, Celestial Weapon Yiazmat, Ultimate Mark Zack Fair Zidane, Tantalus Thief

Coming down as a hasty 5/5 for means you can deal some damage right away, but its the random options that can truly swing a game: putting three +1/+1 counters on target creature, putting a shield counter on target creature and gaining three life, or fighting another target creature a foe controls
It allows you to build a deck full of creatures that would work better when mashed together into one giant creature
Luckily, Gardevoir allows it to get back what it lost, making Mewtwo ex the most consistent threat in the early Pokmon TCG Pocket meta