Shaka Booga (Julie Lemieux) was a prehistoric witch doctor who tried to devolve civilians of the high tech planet Chromius into cavemen using a magical powder in "Devolution City". She once ruled over a planet until a great rebellion, she was captured and imprisoned in an ancient tomb, until she was accidentally released. She attempted to drop her devolution powder into Chromius' tar pits, thereby causing a chain reaction which would cause the planet to devolve into a black hole, which would suck up the entire galaxy, and even turned Betty's bracelet primitive, however, she was beaten when Sparky tied her up with his yo-yo which, being already primitive, was not effected by the powder.
She later returned in the episode "Shake Your Booga", in which Sparky finds a set of bongo drums at a yard sale, which he buys as a birthday gift for Regeena. As Sparky plays the drums, it awakens Shaka Booga, who discovers that her drums are missing. Finding Atomic Roger nearby, she manages to have him take him to Earth and Regeena's party. This does not go unnoticed by Admiral DeGill, who takes a furious Betty (about to dance with Chaz) and Sparky to discover why Atomic Roger has been taken hostage and why she is heading for Earth; Shaka Booga arrives at the party in her absence, and turns all the partygoers into cave-kids (Duncan, however, is surprisingly unaffected), ordering them to steal shiny objects using the power of the bongos. Later, Admiral DeGill orders Betty back to the party; Betty is overjoyed at the news (believing the case was being reassigned), but to her horror discovers the truth after returning to the party. Betty and X-5 manage to fight off her cave-kid friends, capture the bongos, and get Shaka Booga to return her friends back to normal, in exchange for the bongos.