Shak the Shark is (much like all of Terri Mouse's other puppets on the Funday Pawpet Show back when she used to do the show as a regular thing) an accident. Of course, when it came to Shak, he was basically the least accidental of all of Terri's characters that eventually became puppets.

With Shak, he was "conceived" back in March 12, 2000 when Terri was laying on a couch that was off the side of the duplex that the Funday Pawpet Show was being filmed in at the time, and started talking using the voice of Brak from Space Ghost: Coast to Coast and Cartoon Planet. After a bit, though, Herbie demanded that Terri be handed a mic, and suddenly she found a mic being shoved right in her face. She took the mic, started vocalizing Brak on the air, and the rest (as they say) is history.

Shak the Shark was never intended to be the sharpest tool in the shed, but (much to Terri's dismay) the rest of the cast seems to manage to somehow out-stupid Shak.