A) He was wondering about old Safeguard Pokemon vs new Safeguard Pokemon targeting Ex Pokemon vs EX Pokemon, which is certainly interesting because they are the exact same mechanic but technically different names. Additionally, i'm not sure if you are allowed to use 4 copies of Mewtwo Ex and Mewtwo EX or not, but that is also worth looking into. B) The current treatment of Items, Trainers, Supporters and Stadiums applies to all cards previous. Many old cards saying "trainer" are in reference to Items, whereas anything trying to refer to modern day trainers will actually spell out "Trainers, Suporters and/or Stadiums." C) I agree mostly with Vaporeon. However, he overlooked the thing that will absolutely break this imaginary format: Uxie. Claydol and maybe even Porygon2 will be nice too, but with access to Level Ball + uxie, EX decks are going to have so much more speed. AS far as the "no banlist" thing goes you absolutely have to ban Crobat G and Sableye, if not Uxie as well, or no stage 2 will stand a chance.