In case anybody is curious or needs an explanation, F.E.A.R stands for Focus Sash - Endeavor - Attack - Rattata. Try it out like this:

Enter a battle with any Pokemon (preferably a high-level Pokemon so that you’re more impressed) using your Rattata, equipped with a Focus Sash, as your starter. Use Endeavor. Because of its low level, the other Pokemon will attack first, leaving your Rattata with 1 HP (because of the Focus Sash). Rattata will then use Endeavor, which brings the enemy Pokemon’s health down to 1 HP as well. Then use Quick Attack, and watch your level 1 Rattata defeat a level 70 Lugia and gain like a zillion quadrillion experience points from it.

FUCK YEAH, RATTATA