Mongo, along with his fellow team members, was ordered to go kill Bardock's team by Frieza.
When Bardock arrived to find his team members dead, Mongo and his team attacked him. Mongo attempted to kill Bardock with an energy wave, but Bardock used Pierr as a shield, killing his own ally instead.
Lubby then grabbed Bardock, allowing Mongo to deliver some punches to Bardock. However, Bardock got free and spun around causing him to punch through Lubby instead before Bardock killed them both with an energy wave.
- He appears to be the same race as Commander Zeeun.