E-102 'Y'

One of Eggman's robots ended up on the good side. That's fine by me, 'cause it's fun getting to shoot stuff. His nickname is Gamma, for those of you who haven't had the chance to play as him. He becomes friends with Amy, and helps Sonic and his gang.
"I don't see how Dr. Robotnic's [robot] ended up helping Sonic."

Action Stages: His action stages very. But you're always playing for time, and you get time for anything you blow up.