Mega Pokémon

Only Pokemon which can mega evolve in Pokemon X and Y can mega evolve on Pokeheroes. This does not include Poke heroes event Pokemon. Only a Pokemon with a Mega Bubble icon on it's summary page is able to evolve.

How to get Mega Pokemon

Mega Bubble on a Pokemon's summary page.

Only Pokemon on this list are capable of mega evolving.

A Pokemon can randomly hatch out from a normal egg with a 'Mega bubble' on it's summary page.