kai, better known as King Kai. He serves a special purpose during King Kai's training lessons, particularly one of two endurance tests, where trainees are instructed to chase after Bubbles in an effort to catch him. This forces the trainee to push themselves in gravitation 10 times that of the Earth. Goku spends 40 days working on this test, while Piccolo, who is later killed by the Saiyans, Nappa and Vegeta, and is sent to train with King Kai in Other World, manages to catch Bubbles almost effortlessly (as during the year Goku spends running Snake Way and training with King Kai, Piccolo has been training both in solitude and with Gohan). This causes King Kai to outburst that Piccolo should know Bubbles' test was not meant for him, but for Yamcha, Tien Shinhan and Chiaotzu.
Bubbles is killed when Semi-Perfect Cell self-destructs on King Kai's planet, after being teleported there by Goku.
Other appearances EditBubbles makes an appearance in the 1993 film Bojack Unbound, during scenes in the Other World where he is accompanied by King Kai, Goku and Gregory, as well as Broly: The Legendary Super Saiyan, also during scenes in the Other World where he is accompanied by King Kai. He also makes a cameo in Bio Broly telling Goku that Broly's acting up in Hell, and that Pikkon and Goku need to take care of the situation. He , Gregory and King Kai also appear at the banquet in yo! son goku and his friends return!. He also makes an appearance in the Dragon Ball video game spin-off Infinite World, in one of the game's Dragon Missions.
The name for King Kai's pet Bubbles is a reference to the late Michael Jackson's pet monkey, who is also named Bubbles.