So: Krookodile, Dugtrio, Rhyperior, Garchomp, Gliscor, Feraligatr, and Groudon are going to share a common ancestor: KRATOR. the pure ground type Hole croc pokemon, (it stands and walks in a hole) which evolves into the Mound Croc pokemon Allamound at level 28, which is also a pure ground type, and his legs are encased in a mountain. If you give Allamound a fire stone, he evolves into the Ground and Fire CROCANNO, which is the Volcanno Croc pokemon. Crocanno can G-max, and G-Max Crocanno is a Giant Volcanno, with Giant Crocanno sticking his head out the front.