An MMA fighter picks Bunsen to be his new mascot, so Mikey tries to prove that he is a beast too.
- Jeremy Rowley as Bunsen
- Ben Giroux as Mikey Munroe, Little Weasel
- Kari Wahlgren as Amanda Killman, Lady
- Cheri Oteri as Miss Flap
- Jeff Bennett as Bob, Director, Announcer
- Phil LaMarr as Ken, Wendell the Weasel
- Kevin Michael Richardson as Jerry the Beast
- It is revealed that Bunsen has the power to roar so loudly, everyone turns younger by ripping the fabric of space time.
- Amanda appears in the title card, although she doesn't have a major role.