What type of animal is Sonic's companion "Knuckles"?

Sonic's formidable companion, Knuckles, is a character whose identity is deeply rooted in the animal kingdom, specifically as an echidna. This powerful, red-furred hero is instantly recognizable by the large, spiked knuckles on his hands, which he uses for both combat and to scale walls. His distinctive design, including his dreadlock-like spines, clearly establishes him as a member of this unique mammalian species.

Within the rich lore of the Sonic universe, Knuckles holds a significant role as the guardian of the Master Emerald, an ancient and powerful gemstone located on the mystical Angel Island. He is depicted as the last surviving member of the Knuckles Clan, an ancient race of echidnas. This makes his animal classification central to his personal history and his unwavering dedication to protecting his home and its precious artifact.

Beyond the realm of video games, real echidnas, often called spiny anteaters, are truly remarkable creatures. Native to Australia and New Guinea, they are one of only two types of mammals in the world that lay eggs, a group known as monotremes. These fascinating animals are covered in both coarse fur and protective spines, and they possess a long, sticky tongue to feast on insects. Their strong claws are perfectly adapted for digging, a skill that, while applied differently, echoes Knuckles' own powerful, earth-shattering abilities. Baby echidnas are even given the endearing name "puggles."