Dragonball Comedy
Biography
Chiaotzu is Tiens companion and best friend. Im not sure about Chiaotzu's past but from what i know he met Goku. Chiaotzu was recruited by Bulma to train in preparation for the saiyans arrival. Chiaotzu went to Kame's lookout to train in the dream chamber.
When the saiyans came, Chiaotzu died in battle when he saved Tiens life by self detonating on Nappa's back in the hope that it would kill him. Unfortunately he failed. Being the second victim of the saiyans, Chiaotzu joined Yamcha at King Kai's to train while in the other dimension.
Chiaotzu was revived when the Namecks came to Earth. There he trained with Tien in the mountains for 3 years until the androids came. Tien left Chiaotzu with Master Roshi fearing for his safety. There, Chiaotzu trained with Master Roshi although in reality all he did was cook for Roshi.
Chiaotzu stays with the Earth Force as a member of the team.
The Alternative Theory
As previously mentioned, Tien is a gay man. His relationships with men didnt last long and got VERY attached to his gay sex doll (made by VSEINC's sub group Kinky Kame's playthings). When he had the chance to, Tien wished the dragonballs to make his sex toy real. However, Sheng-Long didnt quite understand him and so Chiaotzu was born, a sex toy with sex toy features but with a soul.
Chiaotzu's sole purpose in life is to make Tien happy. After a happy relationship, Chiaotzu was physically abused and beaten by Tien after Tien lost his job at the steel works.
Chiaotzu went to the police and had a court order prevent Tien from coming within 10ft of him, but after talking it out at Krillins book launch, Chiaotzu and Tien got back together. They are currently trying to have a child. May GOD have mercy on us all if they do.