Knuckles the Echidna is the tritagonist of the Sonic the Hedgehog series. When he first appeared, he was tricked by Eggman into fighting Sonic. Eggman told him that Sonic wanted to steal Knuckles' Master Emerald, when he only came to stop Eggman. Knuckles generally gets involved when his Master Emerald is in danger. He is a skilled martial artist who is just as strong as Sonic is fast. Despite her rivalry with Knuckles, Rouge the Bat has a secret crush on him. Knuckles is also a treasure Hunter. He once mentioned that treasure hunting is his favorite hobby. He is a stoic and pure hearted warrior who has dedicated his life to guard the Master Emerald. He is the only survivor the Echidna clan, and has promised to guard and protect the Master Emerald with his life. He is the prodigy of Sonic's team, and a trusted friend. However, he is a loner by nature. He is also the former leader of Team Chaotix.