Sonic the Hedgehog (character)
Knuckles the Echidna: Knuckles is a 16 year old echidna. He may be the strongest of all of the characters and has two sharp claws on each fist he uses to fight with bad guys. Most of the time, he takes care of a very special gemstone called the Master Emerald on Angel Island, a floating island in the sky. He was first shown in the video game Sonic the Hedgehog 3. He can also turn Super using the Chaos Emeralds, and Hyper using the Super Emeralds, which Sonic also uses to turn Hyper.