The latest issue of Japanese magazine CoroCoro has begun to leak and brought with it the reveal of three new Mega Pokémon as well as giving us a better look at Mega Kangaskhan!
First off we now have the official artwork for Mega Kangaskhan and thus can have a better look at it. The scan also reveals Mega Gengar, who now seems to stand on all fours when attacking. It gains the ability Shadow Tag.
The second scan reveals Mega Tyranitar and Mega Aggron. Mega Aggron is exclusive to Pokémon Y, becomes a pure Steel type, and gains the ability Filter. Mega Tyranitar is exclusive to Pokémon X and seems to keep its typing and ability of Sand Stream.
CoroCoro is still being translated so there is a chance a few more details will be translated within the next few hours, so keep checking back!