Everyday I'm Transformin':
-Transform
Nature: Adamant/Modest
Item: Choice Specs/Choice Scarf
Ability: Imposter
EV's: 4 HP/ 252 ATK/ 252 SPD OR 4 HP/ 252 SATK/ 252 SPD

This set is designed to make a sweeper out of Ditto. Really, you make sure you don't use this Pokemon first and you'll be fine. This is so you can avoid nasty Lucarios, Salamences, and other Powerhouses, Physical or Special. Choice Specs/Scarf amplifies the stas even further with Imposter.

I VOTE FOR HYDREIGON!!!!