Magikarp.
Long story, actually.
I started out that day hoping that it would be a perfectly normal day of training and breeding my battling team. It started out normally. Then, as always, I get a weird idea, and weird things start happening.
My first idea was find a pokemon with the sturdy ability, and make it learn Detect or Protect. Then, obtain a pokemon with False Swipe, make them battle, and have the one with false swipe be a high enough level that false swipe would completely get rid of health. The sturdy pokemon survived the hit, but the effects of false swipe and sturdy clashed, and the pokemon fainted. I tried again, and instead the pokemon lived. I'm not sure why this happened, but, ya know. Whatever. Remember, this is just the beginning.
Cutting out the majority of this story (lots of glitching, breaking, and mind****s), lets get to the Magikarp.
So. I thought that having two Lv5 Magikarps fight would be a great idea. I caught 6 magikarps, all at level 5, and then fought another with that team. Long story short, I ended watching a Magikarp ko itself. So yeah......