kk might as well stop lurking and start contributing
Erufuun@Light Clay/Focus Sash
252 HP / 156 Def / 100 Speed Bold Mischievous Heart
~Light Screen
~U-Turn
~Encore
~Taunt/Memento/Stun Spore
This is perfect for setting up sweeps. You come in on an Stat Boosting move, threaten with Encore, use Light Screen and gtfo basically. If you survive, then use U-Turn to get out. ( that should be on every Erefuun set in case you do get taunted.) Another way of getting out would be Memento, in which case you could also stop an opponent's sweep. Stun Spore could be used to cripple sweepers as well or to spread paralysis for your slower sweepers. Talking about sweepers, the pokemon to take advantage of Light Screen should have a really high defense + access to some good stat-boosting moves. These Pokemon could take that role pretty well:
Aggron
Cloyster
Rhyperior
Cloyster + Aggron both have 180 defensive stats, the light screen would give them enough special bulk to set up a few Shell Breaks/SD's.
tl;dr
1) Send in Erufuun, use Light Screen
2)gtfo
3)Stat boost sweeper
4)???
5) PROFIT
I'ma test this soon with Cloyster :D e// With Focus sash... Light Screen and then memento would basically guarantee 2 Set up turns.. (switch + take 1 hit, then raep)