Great Rage at Hallelujah Land! Everyone's Become Children
While Bo-bobo and the others have safely arrived in Holy Guacamole Land, they soon realize the danger of a park where attractions can blow up on you! At least everyone can find refuge in the "Kids Area", where everyone can relive their childhood...and Bo-bobo, Don Patch and Jelly can create their own rock band. No one told them about the adult villain in the park that can make them relive their worst nightmares, but the kid fighters can still have fun, kick butt, and even fuse into...a badly drawn warrior!
Aired 27/11/2004EP 37 - Great Rage at Hallelujah Land! Everyone's Become Children

Bobobo-bo Bo-bobo
Bo Bobo is a man with the incredible power of hearing the voices of hair and using his own to fight. He uses his power to fight off the Margarita Empire and all of Emperor Tsuru Tsuruiina's minions who are stealing the hair off of anyone they find to power up their emperor.
(Source: Anime News Network)