Using my Scizor, I have false swiped both Mesprit and Creselia to 1 hp, but none have status changes. Sleep seems to do the best, so I might train up a Paras, evolve it to a Parasect, train it to an insanely high level, and EV train it for speed since Parasect learns the BEST sleep inducing move, Spore, and I'd like to use it before it runs. Shroomish learns it too, but it takes longer for Shroomish. With Spore, I can guarantee a hit. I just don't like other sleep inducing moves. All are just pretty inaccurate. Sleep Powder is 75% accurate, Hypnosis 70%, Sing 55%, Grasswhistle 55%, Dark Void 80% ( I don't got a Darkrai, but it's still a sleep inducing move that's inaccurate), Lovely Kiss 75%, Yawn 100% (but pretty useless since Cresselia will run before it takes effect) Compare all that to Spore which is 100% accurate. Gotta be careful tho. Parasect has a type advantage.