Splashtaklaphobia

Splashtaklaphobia is the fear of Magikarp.

Why are people afraid of Magikarp?
Magikarp is widely known to have a secret move called Magikarp's Revenge, which you can unlock using bizarre and strange tasks in each game. In Generation 3, you must go to Meteor Falls and catch a Zubat, then beat exactly 33 Pokemon with it, then head to Mauville City, go to Cycling Road and ride around the place 12 times with your bicycle, go to Rusturf Tunnel, catch a Whismur, and take it to the Jagged Pass where you have to battle exactly 114 Trapinches. After completing all this, catch a Magikarp from the eastern side of Route 103, and finally, go into the Trick House and walk in and out of it 23 times. After that, Magikarp should have Magikarp's Revenge.

The attack is a one-hit KO with 100 percent accuracy.

How to get over the fear
Understand that Magikarp cannot hurt you in real life and Magikarp's Revenge is very challenging to obtain.