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| Knuckles the Echidna|
Knuckles the Echidna, also known simply as Knuckles or even Knux, is a friend and rival of Sonic the Hedgehog, as well as a past enemy. Knuckles is often portrayed as a loner, and doesn't work with many people unless it is absolutely necessary.
Knuckles lives and was born on Angel Island, which hovers in the sky due to the power of the Master Emerald. He is the last surviving member of the Echidna people who guarded this emerald; thus, it is his duty to protect it from getting into the wrong hands.
Knuckles is again playable as a unlockable in Super Smash Bros. Zero, he will have a big role in the storyline.
Knuckles can be seen playing hide and seek with Sonic, Tails and Amy. At one cutscene he hides in a very dark shelter along with Mario, Luigi, Sonic, Shadow, Blaze, Silver, Kirby and Link to hide from Mewtwo's Soul Stars.
Knuckles will appear as an ally to Mr. Lucario, breaking rocks that Wobbuffet has put. He also tells Pikachu any victims being kidnapped, like if Torchic is kidnapped, he will say "I see a red Pokemon in Meowth's sack. Go and catch him now!"
Knuckles gets brainwashed by Bowser and Dr. Eggman, along with Sonic and the others. Knuckles is the first boss of the game, shooting projectiles to Mario, but later is defeated. He is playable in every Glass Sphere Rolling Levels.
In Renan!, Knuckles appears as a karate leader working in Nanjing. He teaches Renan to do special techniques of karate. He also guards the Master Emerald, which its temple is now in Nanjing.
Knuckles makes an appearance in Team Knuckles of Sonic Heroes 2. Here, he does his usual job of picking up the pieces after his Master Emerald is smashed; in this game, however, he does so with his girlfriend Shade.
Knuckles returns from Sonic Lost World to Sonic Legends to help Sonic and friends defeat the evil Darkness and save the Chaos Emerald Warriors.
Knuckles is present during the events of the game Make Knuckles Proud.
Knuckles is the main character in the upcoming game, The Legend of Knuckles.
Knuckles appears as a playable character at every Olympics from Atlanta 1996 onwards. From Athens 2004 onwards, he is a power type character.
Knuckles appears as an unlockable character after placing down the Master Emerald.