G-Mel (or Gemerl, the character doesn't seem to have an official name) was a robot created from the remains of his former self, the ancient Gizoid "Emerl". He was rebuilt by Dr. Robotnik, and used to combat Sonic & company in Sonic Advanced 3 at various points of the game. While his predecessor Emerl possessed the ability to copy others and gain new abilities, G-Mel seemed more cleancut, employing various abilities like his super speed, teleporting, and guided missiles. Like his predecessor however, he eventually went berzerk again(for the... what.... 3rd time?) and betrayed Eggman AGAIN. During this period he transformed into a massive sphere-like machine to combat Super Sonic in outer space with giant lasers(where have I heard THAT before...). Though he was predictably defeated by the golden hog(who of course had to team up with Robotnik to do it), the robot survived the attack and fell back to earth, in his reverted G-mel form. It was here where he was discovered by Cream and taken back to Tails' lab, where the fox reprogrammed him to be good, and (assumingly) gave him back some of his memories of when he was Emerl. While Emerl/G-Mel have not made an appearance since, it is assumed that he still lives with Cream & Vanilla, continuing to be the most awesome toy a 6-year old kid could ever want. And maybe doing dishes and laundry or something.