Qwilfish sucks in water, inflating itself. This Pokémon uses the pressure of the water it swallowed to shoot toxic quills all at once from all over its body. It finds swimming somewhat challenging. The small spikes covering its body developed from scales. They inject a toxin that causes fainting. To fire its poison spikes, it must inflate its body by drinking over 2.6 gallons of water all at once.
Pokédex entry #211
Qwilfish is a type poison and water Pokémon that doesn't evolve
Qwilfish in Pokémon GO
It's possible to hatch Qwilfish from an egg?
Yes, Qwilfish it's a Pokémon that can be hatched from an egg. Qwilfish can be hatched from a 5km egg.
Which are Qwilfish’s strengths and weaknesses?
Qwilfish is a poison and water type Pokémon. poison type pokémons are strong against grass, bug, fairy pokémons but weak against poison, ground, rock, ghost pokémons. They are not affected by steel type pokémons. water type pokémons are strong against fire, ground, rock pokémons but weak against water, grass, dragon, electric pokémons.