Karate Island's best fighters are the best fighters on Karate Island. They make their first and only appearance in the episode "Karate Island."
There are three of them and they are all buff and strong. The blue fish is the tallest and wears white clothing. The green fish is the shortest and wears white and purple clothing. He has a black face mask on as well. Lastly, the purple fish is the most buff, and wears green.