CoroCoro has leaked (its on the site that must not be named) and it's revealed the following about Mega Evolutions:
-Sceptile and Swampert both get one. Sceptile becomes Grass/Dragon *hyperventilates*, no word on stat changes. Mega Sceptile gets Lightingrod and Mega Swampert gets Swift Swim.
-Diancie receives one and looks totally pink and fancy. It's ability is listed as ??? which most likely means it gets a new, Mega-exclusive ability.
Steven Stone is looking for the secret of Mega Evolution; it appears he uses a Mega Charizard X (which in the blurry screenshot appears to be level 100). This could be a pointer to Mega Metagross I guess.
-Sceptile and Swampert both get one. Sceptile becomes Grass/Dragon *hyperventilates*, no word on stat changes. Mega Sceptile gets Lightingrod and Mega Swampert gets Swift Swim.
-Diancie receives one and looks totally pink and fancy. It's ability is listed as ??? which most likely means it gets a new, Mega-exclusive ability.
Steven Stone is looking for the secret of Mega Evolution; it appears he uses a Mega Charizard X (which in the blurry screenshot appears to be level 100). This could be a pointer to Mega Metagross I guess.