|Real name||Olgilvie Maurice Hedgehog|
|Alias||Sonic the Hedgehog|
|Series||Sonic the Hedgehog|
|Location||Peach Creek Commons|
|Nano Item||Running Shoes|
|Voiced by||Roger Craig Smith|
Sonic the Hedgehog is the protagonist of the Sonic the Hedgehog series and SEGA's mascot. He is a fifteen-year-old blue anthropomorphic American hedgehog, and is a laid-back and cool-headed character, meant to symbolize peace. As his name would imply, Sonic can move as fast as the speed of sound, has lightning reflexes to match, and can curl up into a ball like a normal hedgehog, primarily to attack enemies. These are the distinguishing traits that were used to make his character and world-famous video games.
Sonic showed up in the Cartoon Network Universe shortly after Fuse attacked. It is unknown where he came from, but he states that he's looking for something. After stopping a Fusion Wilt attack, Sonic helped construct the wall around the Cul-de-Sac, and is currently there. As the player reaches level 20, he can be found at Kingdom Valley, looking for Amy's bird friend, Flicky.
Sonic tells the hero that he's looking for something of his that Fuse stole. After a while, he'll tell the hero that he's looking for his newest pair of running shoes, and has followed a trail of Fusion Matter to Peach Creek Commons. Eddy will then contact the player, saying that he saw someone that looked like "that hedgehog" around the Peach Creek Estates and asking the hero to investigate. After the player has looked for a while, Eddy will contact the player again, telling the player to check the Infected Zone. Once inside, the player will find a mysterious looking Fusion Lair that belongs to Fusion Sonic. Sonic asks the player to defeat the copy so he won't be blamed for anything it might do. Once Fusion Sonic is defeated, the player will be rewarded with the Sonic Nano.