Mukmuk was the pet of Hondo Ohnaka. When Hondo's gang picked up supplies on Vanqor, Mukmuk was pouncing along the shoulders of the pirates. He leapt onto his Master as he was talking to Separatist leader CountDooku. Hondo agreed to transport Dooku to Florrum.
Hondo arranged a group of pirates to surround Dooku once they had transported him, and Mukmuk took both Dooku and Anakin Skywalker's lightsabers (which Dooku had previously taken) in his possession while the Count was locked up.
Mukmuk played an instrumental role in capturing the two Jedi. After several failed attempts to drug their drinks and food, Mukmuk attempted to drop a chandelier down on the Jedi. This attempt was thwarted by Skywalker, who Force pushed the fixture clear of them. Frustrated, Mukmuk then just deposited the drug into the ventilation system which succeeded in rendering Kenobi and Skywalker unconscious.