Chobi is a baby dinosaur of the flying kind that greatly resembles a pterodactyl. He appears in the Great Saiyaman Saga where he who is kidnapped by a greedy circus man named Mr. Musuka. Musuka renames him Rocko and abuses him.
When Gohan expresses his concern, Musuka replies that "money is all that matters". So Gohan turns into Saiyaman and breaks Chobi out of his cage and heads back toward the nest of his father Toh Toh and his mother. However, Videl and all the cops think he's stealing him, and so Videl fights Saiyaman. Then, the situation becomes clear to everyone when Chobi calls his parents, and they attack the city. Gohan accidentally reveals his true identity to Videl when he is trying to calm Toh Toh down. Mr. Musuka steals a police officer's handgun and fires it, alarming Toh Toh to the point of attacking Videl, but he is knocked out by Gohan. In the end, Chobi's family is reunited, all charges against Saiyaman are dropped ("taking a dinosaur is no crime"), and Mr. Musuka is arrested for stealing an officer's handgun.
Chobi and his family were killed when Kid Buu blew up the earth, but were revived with the Dragon Balls.