Hm, what game are you playing? Since you have a fifth-generation Pokémon on there, I suppose it could be either BW or BW2, right? Anyway, one suggestion that immediately crosses my mind while I look at your team is to possibly teaching Breloom Spore. You could replace Stun Spore with it, if you like, and what's better about this move is that you'd be able to make your opponent fall asleep instantly, giving you time to set things up and whatnot, then sweep.
If you could, you could also teach it Swords Dance. Once you lay your foe down to rest with Spore, you should have no trouble using it, and once you do, they are guaranteed to be taken down.
I hope this helps!