Firekitten (EntityClass, 19)

From Compile Worlds

Firekitten, otherwise known as Flareon, is just the cutest thing alive. Not only that, but he's also agile, making him the perfect replacement for Mario:

Outside the empire, firekittens rampage over mushrooms and coins and break the Question Boxes hovering

It is worth noting that Firekitten has nothing to do with Firefox.