Dammit Shocari posted before me. He covered some of the stuff I picked up as well, so you can just ignore that. Also, the Fighting-reducing item is called Chople Berry
- Your Ttar wants Lefties. He's a bulky guy, and he'll want to regain some of his HP. Ttar has a few different sets that work for him, but I can give you advice based on the set that I used (and which worked out quite well). Pursuit over Crunch, you can catch Chandelures and Reunicluses trying to escape, which can be really useful. Stone Edge over Rock Slide as a STAB move, Stone Edge packs more punch. Stealth Rocks. Stealth Rocks are considered by many the best move in the game, and your team lacks them, which could prove fatal. Since Ttar is your lead anyway, give him Stealth Rocks. Dragon Tail can be good for messing stuff up with SR, and you can predict switches and Dragon Tail them into something completely different (or Pursuit, whichever works better). 252 HP, 252 Atk and 4 Def.
- I've never used Excadrill, but I'd suggest at least EQ, X-Scissor and Rock Slide/Stone Edge. Maybe Brick Break for the final move, I'm not sure. Also I think Excadrills usually have Life Orb, but I haven't played much OU recently, so I'm not sure.
- Scald over Surf. Jellicent is a wall, and getting a burn on something (preferably a physical attacker switched in to take out this specially defensive ghost) helps it wall. It'd be good if you could fit in Toxic somewhere as well. I think Water Absorb is a better ability than Cursed Body in general, but you could try it out if you like.
- The best sets for Reuniclus are the Trick Roomer and the Calm Minder. I'm not familiar with the Trick Roomer, but the Calm Minder set goes like this:
Reuniclus @ Life Orb/Leftovers
Magic Guard
Relaxed
252 HP/252 Def/4 S.Atk
- Psychic/Psyshock
- Shadow Ball/Focus Blast
- Recover
- Calm Mind
The EV spread may seem a bit odd, but it all comes down to the Calm Minding. You don't need EV's in S.Atk/S.Def, cos you'll be boosting those anyway. The biggest decision you'll have to make is Shadow Ball/Focus Blast. Shadow Ball hits other Psychics, but Focus Blast hits Dark types. I ran Focus Blast on mine. You want Relaxed so you'll get outsped by any Conkeldurr, so it's Payback will have only 50 Power.
- Switch Protect for Toxic (you won't be needing that with Substitute anyway), Giga Drain for Taunt and Sash for Leftovers. I'm not sure what nature you should run, but that thing is so cheap it shouldn't really matter. (No offense, I just hate Whimsicott and think it's really cheap.)
- I'm not too familiar with Haxorus, but Life Orb is a solid option for an item. You'll want EQ with Mold Breaker pulling down Bronzong and his fellow Levitators. I personally prefer Dual Chop over Dragon Claw because of the Sub-Breaking bonus (great way to slaughter aforementioned Whimsicott)