Why even give op'd/legends outside mewtwo a mega form? Only really see the reason as to him getting one being because he's iconic, and he was in the latest movie//he connects the old gen w/ the present.
People forgot Cress, and Gen 4 is recent. That says something about the legendaries after gen 1 and before gen 5...lol.
I'd like to see them give an alternate ability that works the exact opposite way. Like he's at full power for 5 turns, then he gets massive stat drops. It would make him a hit and run powerhouse, kinda like Slaking but much better.
This would make him counterable with entry hazards while also allowing him to be powerful, though unable to just sweep entire teams as a lead.
FAIL WAR! Let's do it! I'll warn you... YOU CAN'T BEAT ME! - Deprece