What do we want to say about megas that lose their gym's typing upon Mega Evolution? Specifically I am talking about: Mega Charizard X (Flying), Mega Gyarados (Flying), Mega Aggron (Rock), and Mega Altaria (Flying). On one hand, all 3 (current) Mega Evolutions that change a type upon MEvoing are pretty good, and the Flying gym needs all the help it can get. On the other hand, it allows a gym leader to use a Pokemon in their gym that is not of their specialty type. This isn't an issue currently as neither the Flying nor Rock gyms are open, but it would still be nice to get a ruling.