Type: Fire/Ground
Classification: Eruption Pokémon
Height: 2.5m
Weight: 320.5kg
Ability: Sheer Force
In Pokémon Omega Ruby, it is used by the Team Magma leader, Maxie. After Mega Evolving, the humps on its back transform into one large and very active volcano. Magma is constantly bubbling up from within its body. The volcano on its back erupts constantly in an effort to intimidate its foes.
When it Mega Evolves, it gains the Sheer Force ability. It grows stronger, and any moves that can have additional effects will grow in power—but it’s important to keep in mind that they will no longer be able to trigger their additional effects! Most of its stats are uniformly raised averagely, but it does become slower.
Reference and images: Serebii.net
Additional references, images, and information: pokemonrubysapphire.com