Oh Lord, mine would probably have to be my first level 100, ever. You'll never guess who it is.
FEAROW! That thing was a baller back then. Don't ask me why I did, lmao. I remember getting up at 7 AM and stuff (when I was off school) and training it. I didn't have a Gameboy light back then, so I just had to turn my room light on and do it.
God, those were the days. xD