I would rather get some non-starter Pokémon as another rep (like Mawile), BUT to be honest, I think Pokémon has plenty of enough reps with Pikachu, Charizard, Lucario, Greninja and Jigglypuff. If Mewtwo is back, then it will already be TOO MANY reps, unless Purin is cut. Seven reps would be overkill even for Nintendo's second most milked franchise. If Mewtwo isn't back and Purin isn't cut, then Sceptile would be more acceptable... As far as Grass-type starters are concerned, Chesnaught would be better though, but I know it has zero chances because of Greninja.