A Hoopaloo existed in the time of the High Republic Era. He was employed with the monster hunter Ty Yorrick on a job located on the Outer Rim planet Alzoc III sometime between 241 BBY and 231 BBY. During this employment, the Hoopaloo turned on Yorrick, stole a portion of her weapons, and ran off. The hunter chose not to pursue the Hoopaloo, resigning herself to the loss.
During that year, while she was on the planet Safrifa, Yorrick thought back mentally to the failed job on Alzoc III, remembering when the Hoopaloo had stolen her arsenal. The hunter reflected that most other mercenaries would have tracked down the "kriffing" Hoopaloo and torn off his beak. Yorrick realized that she was different from other mercenaries, accepting that unfortunate events occurred and one simply had to deal with them. She also reasoned that it was a waste of time and energy to chase after the Hoopaloo, especially if she was not being paid to do so.
The character of the Hoopaloo is featured in the novel The High Republic: The Rising Storm, which was written by Cavan Scott as part of Phase I of the Star Wars: The High Republic multimedia project, and released on June 29, 2021. Before the novel's publication, the character was mentioned in an excerpt from the novel that appeared on StarWars.com on April 22 of that same year.