Gyarados (Diamond) lvl 100, EV trained both in 1 day. (Favourite pokemon alongside Scyther)
Crobat (Gold) lvl 100, EV trained in 2 months.
Martini the Scyther, lvl 50 spec. att. & speed EV's. (Solarbeam ftw!
You should see the reactions I get on that one!
And last but not least.. Lvl 100 caterpie (gold) Moveset; String shot, Tackle. :D Took me a week.. still cant beat the elite four. :P