I tried a little testing with Hypno, and let me just start by saying that NP Hypno is terrible. Base 73 SpA is really weak sauce, and its speed doesn't do it any favors. Trick Room sorta fixes the speed problem, but it's really not a move to rely on, and Hypno rarely gets the opportunity to use both NP and TR (which it really needs to sweep effectively at all). It also pretty much dies if Skuntank or Absol walks onto the field. I have no clue why you would use this over Mr. Mime, who has much more speed and power, as well as Baton Pass to boot and (IIRC) protect it from Pursuit.
The specially defensive set is actually kinda decent. It soaks up special hits easily with its great special bulk and WishTect, and at least it has Seismic Toss to help its low level of power. The real problem here is finding a reason to use it over another Wish-based special wall. Lickilicky is usually going to be better with its decent power, similar if not better special bulk, good physical bulk to compliment, bigger Wishes, Heal Bell, and Dragon Tail phazing. Flareon also gives it some competition with its arguably better resistances, Heal Bell once again, Roar phazing, and the ability to do decent damage and spread burns with Lava Plume. Neither of these guys are complete Pursuit bait either. The resistances to Psychic and Fighting attacks are nice, but many Psychic types have ways of getting past Hypno (i.e. a boosted Shadow Ball), and the most common Fighting types can muscle past Hypno by targeting its much lower physical bulk.
So honestly, the specially defensive set is the set to use for this guy. It's actually pretty decent, but you always have to ask why you're using this over something else.
