Lets be honest, Hippopotas, the staple to Sandstorm teams, has means of offense whatsoever. So, I tried this.
Hippopotas @ Eviolite
Trait: Sand Stream
EVs: 4 HP / 252 Def / 252 SDef
Careful Nature (+SDef, -SAtk)
- Stealth Rock
- Slack Off
- Rock Tomb
- Mud-Slap
This set has worked to great effect in UU, since almost all other Hippopotas sets are shut down by Taunt. Taunt + WoW Mew? No problem, lower its Speed, and then send in your CB Mamoswine. Deoxys-D giving you trouble? Lower its Speed so that slower sweepers such as Escavalier can match it. It can even handle Chansey (without Toxic), to some extent; Lower its Speed, get it to -6 Accuracy. Hippo can take 2 Seismic Tosses, and 3 if 96 EVs are invested in HP. From there, you can PP Stall it out, with Sandstorm and without Leftovers, Chansey won't stand long. You could use Tackle in place of SR to stall it out for 64 turns, but otherwise its a wasted moveslot.