http://www.smogon.com/dp/pokemon/gardevoir
Pokemon: Gardevoir
Nature: Calm
Ability: Trace
Item: Leftovers
EVs:
252 HP
252 Def.
6 Sp. Def
I chose to max HP and Defensive EPs to simply allow Gardevoir to take as many hits as possible plus with Thunder Wave Speed EPs aren't really needed.
Calm...