Things You'll Need
Instructions
Johto Route 32
Travel south from Violet City onto Route 32 in the Johto region. Walk south onto the pier where three fishermen are fishing for water-type Pokemon.
Face any part of the ocean and press "Start" to bring up the in-game menu. Select the super rod from your key items bag to go fishing.
Fish for a wild Qwilfish. There is a 10 percent chance of encountering a Qwilfish. If you encounter any other wild Pokemon while fishing, defeat them or run away from battle. Select your super rod in your key items bag again to continue fishing.
Engage the wild Qwilfish in battle. Weaken it until its hit points are in the critical red zone and throw a poke ball. You can also use status-changing moves that cause sleep or paralysis to make Qwilfish easier to catch.
Kanto Route 12
Travel south from Lavender Town onto the lengthy pier known as Silence Bridge. There are many fishermen fishing for wild water-type Pokemon at the sport fishing area.
Approach the sport fishing area, face the ocean and select the super rod from your key items bag to fish for a Qwilfish. Qwilfish in this area have a 10 percent encounter rate and will be at Level 40.
Battle the wild Qwilfish, afflict it with a status ailment and lower its hit points into the red zone. Throw a poke ball to catch it.