Yeah! Every Mega Evo except Garchomp and Ampharos have that eye discoloration!
Here's what Pokémon I think are exclusive to Y: Obviously M. Mewtwo and M. Charizard Y!
M. Venusaur
M. Lucario
M. Absol
and M. Mawile
I've only seen M. Mewtwo X, M. Charizard X, and M. Blaziken.