Knuckles the Echidna is a popular video game character in the Sonic the Hedgehog universe of games, movies, and cartoons, known for his cool demeanor, unique abilities, and interesting story. Knuckles serves as the guardian of Master Emerald on Angel Island and is known for his ability to glide through the air and climb walls. Knuckles is a red anthropomorphic echidna, a loner by nature and an independent personality, headstrong and serious yet gullible. He is an echidna who cares very little about what others think, which makes him bluntly honest, straightforward, and somewhat egotistical. A fanart Sonic the Hedgehog progress bar for YouTube with Knuckles the Echidna Pixel Run.