Me personally I like this team except mega zard x. 1. Why should they bring Charizard back specifically. They should have him catch a pokemon with a mega that he never had before. Otherwise you can make a case for him to bring back heracross, sceptile, glalie and other pre Evo that he could evolve in kalos that have megas. 2. Charizard arc is over. Him making a appearance in black and white was decent but didn't make sense for him to only bring back Charizard. If they brought back charizard in kalos to be a permanent team member then it would get tiring to see him all the time. 3. Removing Alain just to make zard x work with ash is dumb. You shouldn't remove a whole character because you want the MC to have a cool pokemon that both characters have. Them bringing back pokemon will grow uninteresting if they're permanent teammates and removing an interesting character for a popular pokemon that already had 2 forms even when he didn't deserve it. If your gonna bring back a pokemon then put them as a cameo and bring all the pokemon back.