Knuckles the Echidna is a fictional character from the Sonic the Hedgehog series. He is an anthropomorphic echidna and the current guardian of the Master Emerald, a powerful ancient relic which is his solemn duty to protect from anyone seeking to abuse it. He is also the sole remaining descendant of the Knuckles Clan and last of the echidnas on Earth. His dominant traits are his superhuman strength, and the two spike-like knuckles on each of his hands, from which his name is derived from, which he can use to dig with and climb walls. He can also trap the wind under his dreadlocks to glide through the air.
A loner by nature, Knuckles is independent, headstrong and serious, yet gullible and short-tempered to a fault. He is entirely devoted to his duty, spending most of his time on Angel Island protecting the Master Emerald, and rarely cares for anything that is of no importance. When his friends and others are in need of his help, however, Knuckles can always be relied on being willing to leave his post and prove himself a faithful and good-hearted hero. He is also one of Sonic's oldest friends and rivals.
In Goanimate, he was originally going to appear as a bad user, but he is a good user and one of Sonic's friends.
- Voice: Eric, Paul
- Likes: Grapes and other fruit, Digging holes, Peace and quiet, His friends, Fighting and training, Relaxing, Being left alone, Guarding the Master Emerald, Sonic the Hedgehog (now), Espio the Chameleon, Rouge the Bat (to a degree), Emerl, Shadow the Hedgehog (to a degree), Chaos (currently)
- Dislikes: Strong sunshine, Being tricked, betrayed, or otherwise taken advantage of, Fighting/hurting innocent people, Doctor Eggman and his robots, Sonic the Hedgehog (at first), Anyone who comes after the Master Emerald, Rouge (to a degree), Ix, Black Arms, Biolizard, Chaos (formerly), Being thought of as weak, Failing to protect the Master Emerald, Rouge messing with him
- Singing voice: Camui Gackpo and Big AL
- Love Interest: Tikal the Echidna