Qwilfish

Qwilfish is a /-type Pokémon introduced in Generation II.

Appearance
Qwilfish resembles a pufferfish. It has a Bluish Greenish top, and a pale underside. Noticeable things on Qwilfish are it's toxic spikes, it's paddle like tail, and Qwilfishes round shape. In Pokémon Diamond and Pearl you can catch it out in the water you can get to out of Iron Island. And its eyes are strait and serious.

Trivia

 * Despite being a bad swimmer, it can learn Surf which really good swimmers can do.