The main plot for the series was for the crimefighting sumo wrestlers to go on an adventure and fight using their buttocks. There were three sumo wrestlers called Booma (the somewhat child-like enthusiastic surfer-voiced sumo), Kimo (the Japanese, Zen-like sumo with a strict honor code) and Mamoo (the sensible, unofficial leader of the trio).
It was aired from 2002 to 2003 on Nickelodeon in the United States.
A generic episode consisted of "Bad Inc" trying to destroy the city of Tokyo by numerously themed ways- although almost all of their plans involved giant monsters. The head of Bad Inc, Ms. Mister, usually assigned the in-house mad-scientist Stinger (who was in love with her) to create these evil monsters. At the end of each episode Ms. Mister fires Stinger for failing to create an unstoppable monster (although he always appears employed in the next episode, and is never actually fired). Every episode contained gratuitous use of the word "butt".