I already said this in the Metronome thread, but I'll post it here as well.
I decided to go to the Mt. battle, to train some Pokemon and raise some levels of the Pokemon I've EV trained last week. In battle 100, I ended up having only a severely damaged Togetic left, the opponent only had his Slaking left. Slaking was loafing around and quite damaged. Togetic used Metronome, and ended up using Double-Edge. Togetic charged Slaking and hit him in the nuts! Nah, just joking about the nuts, but Togetic hit Slaking. Slaking ended up having around 1 HP left, barely surviving the Double-Edge, and Togetic died because of recoil damage... All my recovery items and money I spent on them wasted... And I forget to save before the battle while I got many EXP in the battles before the lost battle, so pressing the power button of my GameCube was not an option... I put on my rageface after that battle!