Poliwag is a Water pokemon introduced in Generation I. It evolves into Poliwhirl at level 25.
Poliwag was one of the original 30 contestants and the DJ of the group. He evolved into Poliwhirl in episode 5, eventually finishing 32nd out of 39.
Woli was a Poliwag in Dinoguy11/Dinopoke10's Pokémon Champion Island. He was annoying and couldn't find his cabin fast enough in ep 1-Cabin Chaos beaten by Buzz but only just. All campers have his statue to show that he was beaten.