Knuckles the Echidna (????????????? Nakkuruzu za Ekiduna?) is a video game character, and a hero of the Sonic the Hedgehog game series, as well as some spin-off games and comics. His first appearance was Sonic the Hedgehog 3, released in 1994 to introduce a new rival for Sonic, presented as an antagonist who was tricked by Dr. Eggman into fighting Sonic. Knuckles is a 16 year old red anthropomorphic echidna, who is both physically powerful and highly resilient. In most of the Sonic games, he has the skill to climb ledges or walls, as well as the ability to glide in the air for short periods of time. He has a white crescent on his chest and four knuckles, two on each hand, which are actually sharp spikes. He is both a friend and a rival to Sonic.