Dr. Bobble was known among the scientific community for his interest in developing muscle tissue with Delta Rays. After nobody wanted to hear about his research at a New Year's Eve party, he decided to test out his new Delta Ray Machine on himself, to give himself the physique of a "bronzed beach patrol guard". However, he absorbed too much of the machine's rays, which turned his skin purple (and his trousers green). His muscles continued to grow while his intelligence reduced. Horrified by what he had become, he attacked the New Year celebration on the street. Sonic and Chaotix turned up to fight him but he was too strong for them. Unfortunately, his muscles grew so large that he was unable to move.