Why use Yawn, when Hypnosis is so much better? Sure, it only has a 60% chance to hit, but it only takes one turn. I've been using this thing on my trick room drought team, and it works great. Here's the set.
Mushaana (F) @ Leftovers Trait: Synchronize
EVs: 252 HP / 52 Def / 4 SAtk / 200 SDef
Sassy Nature (+SDef, -Spd)
- Trick Room
- Hypnosis/Yawn
- Psychic/Psycho Shock
- Moonlight
Trick room is there for team support. I also have it on exeggutor, but this thing has so much more bulk. 116/85/95 is nothing to scoff at, and moonlight ensures that you can heal 2/3rds HP (due to Sunny Day), making you nearly impossible to beat. Hypnosis to get a few extra turns, although Yawn could force switches with 100% accuracy. Psychic is what I use for damage, but Psycho Shock is also good for taking down things physically (I have it on exeggutor though).
Here's the stats for this EV spread:
436 HP
146 ATK
219 DEF
251 SPA
303 SPD
56 SPE
Great HP, good defenses, and a solid special attack. Plus it's one of the slowest pokemon in the game with -spe nature, 0 ivs, and no evs in it.
I like Musharna better than the jelly animal thing, because of its better defenses, slower speed, and access to hypnosis. Trick room users should be bulky enough to survive multiple hits and still set up trick room, and musharna does an excellent job with that. I've won 90% of my matches with this on my trick room drought team.