Mikokatsun is one of the Bio Warriors in the Dragon Ball Z movie 2. Like Majin Buu, he's nothing but fat, he can reflect simple attacks and mere punches won't do a thing to him. His only attack is his own obesity, which is an advantage to his part. Goku finishes him off by using Kaio-ken to tear right through him. We then see Mikokatsun deflate like a balloon, which kills him. He also shares a resemblence with Drum, Dodoria, Wings, and Majin Buu.
Along with countless other Dragon Ball antagonists, Mikokatsun makes a cameo appearance in the 1995 film Fusion Reborn when the residents of Hell make their escape to Earth.