G-merl (ジーメル Jīmeru?), also known as Gemerl, is one of the main antagonists in Sonic Advance 3. He is a Gizoid created by Dr. Eggman from Emerl's data, making him a revised version of his predecessor. G-merl once aided the doctor in his attempts to stop Sonic and his friends from foiling one of his plans, but wound up betraying Eggman to cause mayhem. After his defeat, he was reprogrammed in the image of his predecessor.