Billy Bob Brockali – Bass / Vocals.[5] A brown bear from the South who wore yellow and red overalls and played a wooden banjo. He was the mascot for ShowBiz Pizza Place throughout its existence, and his image was on most of the chain's merchandise. Sweet and naive, Billy Bob was usually a mediator to the band's minor on-stage squabbles.
Looney Bird – Vocals. Looney Bird shares Billy Bob's stage, as they are supposedly close friends. His head is the only thing ever seen, the rest of him hiding in an oil drum. Some shows featured a segment where Looney Bird would answer fan mail. For this, the robot was retrofitted to include a pair of hands that held a piece of paper for him to read. Looney Bird was portrayed as an alcoholic, but became more interested in technology as years progressed.
Dook LaRue – Drums / Vocals. A mongrel who aspired space travel and wore a space themed suit. Slightly dimwitted, Dook would often lose focus during shows and miss his cues. The character is unique in that, when set up properly, he has the ability to actually play a 4 piece drum kit in time with the music.
Fatz Geronimo – Keyboards / Vocals. A silverback gorilla. He is a parody of real-life entertainers Fats Domino and Ray Charles. Unofficial band front man, Fatz had a tendency to ramble. He introduced the most shows and ordered other band members around, leading him and Rolfe DeWolfe into many arguments.
Beach Bear – Guitar / Vocals. A polar bear with a laid back attitude and a smooth singing voice. When voiced by Aaron Fecther, his personality was more erratic, to fit with the voice he had provided. Beach Bear would usually make sarcastic comments or ask other characters questions to throw off their act in the name of fun.
Mitzi Mozzarella – Vocals. Mitzi is a mouse and a cheerleader. A typical teenager, Mitzi was considered "loose" by the rest of the Rock-afire Explosion, and is obsessed with gossip, boyfriends, pop music, and (appropriate for the time) Michael Jackson.
Rolfe DeWolfe and Earl Schemerle – A ventriloquist/comedy act. Nominally a stand-up comedy act performed in between musical sets; Rolfe is a wolf, and Earl is his sentient ventriloquist puppet. Rolfe is portrayed as sarcastic and abrasive, with a tendency to be incredibly rude to both the band and the employees that work at Showbiz. He has a fondness for disco music and the works of Frank Sinatra. Earl was there to "set him straight" by calling his behaviors out, and by turning Rolfe into a joke.

Left Stage
Right Stage
Center Stage