Tongo

A nurse asobot who looks like a fat cat that likes to eat. His weapon is called 039Chain Hammer039. Later like Goku and Jo he collected 6 keys which can change his appearance and his weapon making it the 039Megaton Hammer039. At the last part of the series he fought off Professor D. along with Goku Yazu and friends. He came back to past along with Goku and friends since the bandit should never abandon each other. Source: Wikipedia