I heavily disagree with the idea of letting mons keep their old ability. The purpose of an Other Metagame is to change almost everything in the game. The top tthreats must be different. For example, while Aegislash becomes a shitmon, Pyroar becomes pretty strong thanks to Parental Bond, while other Pokémon start to work completely different, think about Talonflame skipping from Gale Wings to Tinted Lens. Allowing old abilities kinda makes this much less interesting. About the X and Y Pokémon, we could force them to run Honey Gather, which is like carrying no abilities, if completely removing abilities is impossible. The only viabile Pokémon in Z are Zapdos, Zoroark and Zygarde, and two of them pretty much have no ability even in standard.
And yeah, Shadow Tag, Arena Trap and Wonder Guard need to immediatly go home.
And yeah, Shadow Tag, Arena Trap and Wonder Guard need to immediatly go home.



