Topic. Change a Pokemon's ability, moves, move effects, or give it a whole new move to make it completely broken, that it would be incredibly strong. I'd appreciate it if you didn't make abilities like "Everything faint when you switch this Pokemon in" or something of the sort.... Mine: Darkrai is now Dark / Ghost type. Pokemon put to sleep by Dark Void now lose 1/6 of their HP every turn, stacks with Bad Dreams.
Shedinja still goes down to....Well, any sort of passive damage.
And Whimsicott with Spore still has to follow Sleep Clause. What's your point? It'd still be awesome. EDIT: If you prefer, though... Shedinja gets Sturdy and is allowed to gain HP EVs like any other normal Pokemon.
My NIDOKING brings all the boys to the yard: http://goo.gl/ExAoe