Umbreon @ Leftovers
Careful Nature ; 252 HP/ 92 SpD/ 164 Spe
Synchronize Ability
~Baton Pass
~Taunt/ Toxic/ Some Attacking Move
~Wish
~Mean Look
Pass on a wish AND the mean look, so they can't switch when you put in a super effective type... Taunt is for no stat build up when you are doing this, bad thing is that you don't have a move that can hurt the foe... Toxic might help...