|Abilities||Poison Point, Swift Swim, Intimidate (Hidden)|
|Episode First Shown in||Dueling Heroes|
|First Known Owner||Harrison|
|First Game Appeared in|
|National Dex Number||#211|
Qwilfish resembles a Pufferfish. It has a round body with several large spikes around it. The top half of its body is a greenish-blue colored and the bottom half is a white color. It has pink lips located on the dividing line of the top and bottom half of its body, and it has two half-oval shapes eyes with a small black pupil in each one. It has a short tail, surrounded by the greenish color and filled with the white color, with two green oval-shaped shapes inside.
- A Qwilfish is seen in The Mopthro Journey Begins!.
- Harold's Quilfish appeared in Vs. Vaporeon.
- A Rocket Grunt's Quilfish appeared in Vs. Red Gyarados.
- Wild Quilfish appeared in Daddy Issues: Raising the Prince of the Sea.
- A trainer's Quilfish appeared in Attack by Day.
- A Quilfish was part of Lawrence's Collection in Collecting the Regis.
- Wild Quilfish appeared in Under the Coast.
- A Wild Qwilfish appeared in Going Fishing.
- Fell Stinger
- Poison Sting
- Water Gun
- Toxic Spikes
- Spit Up
- Pin Missile
- Take Down
- Aqua Tail
- Poison Jab
- Destiny Bond
- Hydro Pump