Okay, first time posting on a thread, forgive me if I suck.
First up, Duosion.
Duosion @ Life Orb
Trait: Magic Guard
EVs: 252 Sp. Atk/252 HP/4 Def
IVs: 3 Spd
- Psychic/Psyshock
- Signal Beam
- Hidden Power Ground
- Trick Room/Recover
This little guy is cool, and with magic guard, he's a threat. He doesn't take damage from life orb or hail, and since you have trick room, fast. Psychic is STAB, and is Duosion's best and powerful move. Psychic is if you fear special defense. Signal beam, good coverage to deal with Psychic and Dark types. Hidden Power Ground, for dealing with those pesky steel types. Since you have trick room, you can use recover but if you are afraid of it wearing off, slap on another trick room.
I didn't think that was good, so I will post more soon.
Okay, here is another one.
Weavile @ Choice Band
Trait: Pressure
EVs: 252 Atk/252 Spd/4 HP
Pursuit/Fake Out
Ice Shard
Low Kick
Night Slash/Ice Punch
the fast Devil Weasal, one of my faves. Pursuit is for when they see it and want to switch out. This requires prediction, and if you don't like that, then there is fake out. Ice Shard, STAB, Priority for if you want to be speedy. Low Kick is good coverage, and most of the Pokémon who counter you are heavy. Night Slash is for STAB, and chances for critical hits. Ice punch is here for STAB, and freezing hax.
More to come soon, in case you hate my suggestions, here is a guide to hail in UU.