It has high health and high tankness. It can learn counter and mirror coat. It is weak against bug, dark, ghost which bug happens quite a bit and dark and ghost does happen to be in a lot of peoples parties but from my experience I don't see a whole lot. Plus even if it was super effective wobbuffet can use counter or mirror coat which doubles the damage dealt to it. It can use encore which if the move the enemy used was too much then you use encore to prevent them from using it for a long time. Wobbuffet can have destiny bond for a last resort. It is total cheapness. This pokemon can gaurantee 1 kill. Gauranteeing one kill is always an uber.