Fortunately, thats why we have Kangaskhan or Hypno, and those decks have significant weaknesses that Mewtwo can exploit: Charizard EX takes a long time to set up without Moltres (which Mewtwo EX can OHKO) and Blastoise EX requires a lucky Misty draw to reliably get its Energy
If you prefer something more modern and premium for your collection, TAG 10 is a great option
Twitching Doll is also a strong ramp option, providing one mana of any color each turn, and can be sacrificed after stacking up enough nest counters to flood the board with aggressive token Creatures
Unable to die by blade, age, or any other method his assorted enemies have tried, Squee has had his fill of adventuring and now lives in "retirement" as the chieftain of a goblin tribe high in the Otarian mountains
both contests were part of the Challenge Road 99 SUMMER event