- "Onca, you and your brother have been a legendary team. This challenge may prove difficult with you alone."
- ―Dooku to Onca after his brother's death
Onca was a male Ithorian Bounty hunter during the Clone Wars, who often served with his brother and partner, Bulduga. At some point during the war, he and his brother were invited by Count Dooku to participate in a tournament known as "The Box".
Onca and his brother formed an legendary duo throughout their bounty hunting careers. Eventually, their many successes caught the attention of Count Dooku, who invited them to compete with several other bounty hunters in The Box, a death machine that tested the skill and mind of each person who entered it's deadly grasp. But, before the contest started, his brother Bulduga was shot by Cad Bane over his brother's "nice hat". He survived the first room thanks to Rako Hardeen (Obi-Wan Kenobi in disguise), but the second room they entered into from the tunnel was very dark and cubical in shape. A panel, tipped with an electrified laser blade, slid forward across the room and would have impaled Onca if he had not dodged it. Several more panels, also tipped with the same deadly weapon as the first, slid across the room. Onca became suddenly boxed in by several panels and was forced to stand perfectly still as a panel slid towards him. The blade stopped inches short from slicing into Onca's head, much to Onca's relief. Though Onca was caught of guard and impaled through the back by an electrified laser blade that sprouted out of the panel behind him.
- The Box (First appearance)