A burn halves Attack, not Defense. You probably mean that no EVs need to be put into Def.Reuniclus @ Flame Orb
Ability: Magic Guard
Nature: Calm
Moves:
Trick
Thunder Wave
Recover
Psychic/Psyshock
EVs: 252 HP/4 Def/252 SP. D
I don't know if this set has been posted, but it looks really nasty on paper. I plan on using it as a lead. Start off by crippling one of your opponents right away by either form of T-Wave or Trick/Flame Orb. Once either is reviled your opponent can't safely switch onto without getting hurt by either status. If they don't want to take a T-Wave, and switch into say Garchomp or Excadrill or any other Ground Pokemon, they have to take a Burn. It's great for Stall teams in case you can Burn one of their Physical sweepers, even if you can't the burn will still aid in the slow down fall of your opponents Pokemon. Because of Flame Orbs stat reduction, no EVs can be put into Def. But a 252/150/138 or enough EVs to make it a "mixed" wall can be used. As with it's above average base HP of 110, it can wall both side pretty well.
Thoughts?
Btw, this is done better by Sigilyph, who can burn more than just one thing, can still use T-wave and has Roost over Recover, and it can actually benefit from the T-wave due to its actually usable speed. It may have less bulk, but it's faster.