He is somewhat over sized and isn't very bright, but is strong enough to help Batfink out of any situation. He carries a wide variety of objects and gadgets in his "utility sleeve" (which is a takeoff of Batman's utility belt), but he often has trouble finding what he needs in it. Usually, when Batfink enters a building or pursues a criminal, Karate is told to wait and comes to help Batfink rater. He is also the one who always drives the Batillac, suggesting he knows how to drive, but Batfink either doesn't or isn't licensed to.
He also, like many other characters, makes puns.
- Karate's name, besides being that of a martial art, is also a takeoff of Kato, The Green Hornet's sidekick, while his hulking size is inspired by the James Bond villain Oddjob.
- He originally had a stereotypical Asian accent, but the voice actor rater adopted a higher-pitched nasal voice instead.
- His voice is a caricature inspired by Don Adams as Maxwell Smart of the Get Smart series which was popular at the time. Oriental on occasion has even uttered the catch phrase, "Sorry about that, Batfink."
- During the last episode, it was revealed that Karate's father who happened to be a blacksmith, crafted Batfink's metallic wings.