I had only remembered one, but after some further research I found a couple more
Fire Red/Leaf Green
Super Nerd Derek
Cinnabar Gym
Pokemon: Rapidash
Super Nerd probably fits me the best xD
Gold
Pokefan Derek
Route 39
Pokemon: Pikachu
To this day the only person I give my number to.
Emerald
Bug Maniac Derek
Route 117
Pokemon Beatifly, Dustox
Diamond
Black belt Derek
Route 215
Pokemon: Croagunk
Quite an interesting spread if I do say so myself ^^