|This character exists primarily or exclusively within the Sonic the Comic continuity.|
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
Doctor Bob Bobble was a scientist in New Tek City who was transformed into a purple monster that called itself the Bulk.
Doctor 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, and as they did so his intelligence was 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 became unable to move.
Vector recovered his Delta Ray machine and fixed it. After Bobble was returned to normal, Sonic destroyed the Delta Ray machine and the doctor made a resolution to use his knowledge for good in future.
As Bob Bobble, he is incredibly arrogant about his genius, but also very boring. He refuses to have any fun or talk about anything except his work, even at a party.
As the Bulk, he is nearly mindless but incredibly strong.
- Doctor Bobble (and his alter ego, the Bulk) is an homage to the Marvel Comics superhero, The Incredible Hulk. The Hulk is a green monster famous with purple trousers, and the Bulk is a purple monster with green trousers. The Delta Rays that transformed Bobble into the Bulk are similarly a reference to the Hulk being created after being pelted by Gamma Rays. The Hulk also says quotes such as "Hulk smash!" as the Bulk says "Bulk smash!". Doctor Bruce Banner loses intelligence when he transforms as Bob Bobble does when he transforms. This was one of the many Marvel parodies that appeared in Fleetway Editions' Sonic the Comic during the life of the series.