Groxians

Groxians are an alien race which the Smurfs encounter one of its members in the EMPATH: The Luckiest Smurf story series. They are humanoid beings with yellow skin and have rotund bodies with hard shell-like protrusions that have the consistency of rock on their backs. Although they appear to be all male and even identify themselves as male, the Groxians are actually hermaphrodites who reproduce children by themselves without the need for intimate relations, birthing them through what appears to be their navels. Despite this, the Groxians pride themselves on their incredible strength and their ability to eat solid rock as nourishment.

The Groxians are based on the Gorons from The Legend Of Zelda game series.