I found this to be a very effective stall set
Mandibuzz
EV`s: 248 Hp 8 Def 252 spD
nature: carefull
abillity: overcoat
whirlwind
roost
toxic
u turn
It takes for ever to kill this thing as it keeps making you switch so you only ever get one super effective attak in before it whirlwinds you out...