Poliwag

Poliwag appeared in 1996 video game called Pokémon Red & Green. Poliwag is a Tadpole Pokémon. Poliwag's skin is so thin that you can see right through it to the Pokémon's spiral-shaped insides. It's not very skilled at walking on land, but a Trainer can help it get better.

Poliwag is a Pokémon resembling a blue, spherical tadpole. It has large eyes and pink lips. Its skin is very thin, but flexible and difficult to puncture. There is a black and white swirl on its abdomen, which is actually its internal organs showing through its semitransparent skin. The swirl is clearer following a meal and will have a white tinge if the Pokémon is affected by disease. The direction of the belly spiral differs by area; the equator is thought to have an effect on it. It has newly developed legs that are poor at walking and no arms. It has a long, thin tail surrounded by a light blue, semitransparent fin. Its tail makes it a powerful swimmer. Because of its ineptitude on land, Poliwag is more likely to be found swimming in small freshwater ponds and lakes. In the anime, Poliwag feeds on salveyo weed, which can only be found on clear lake bottoms.