I personally prefer using a scarfed Victini as my Mold Breaker of choice -- different niche entirely than a banded set or a utility set, but powerful fire and electric attacks mean that Flash Fire and Volt Absorb mons can't switch like they would want to. Doesn't really need to boost, either.
And on that note, Primordial Sea Genesect is something that I've seen used to great effect (and stolen and then used to great effect), and because I've not seen the set posted here, I'll share it:
Genesect @ Douse Drive
Ability: Primordial Sea
EVs; 4 HP / 252 SpA / 252 Spe
Nature: Timid
IVs: 0 Atk
- Techno Blast
- Thunder
- Bug Buzz
- U-Turn/Ice Beam
Douse Drive is also un-trickable and can't be knocked off. Primordial Sea + 120BP water attack = Lazerbug. Thunder is perfectly accurate in the rain and gives great coverage, Bug Buzz is STAB that goes through substitutes, U-Turn lets you switch out with damage to special walls. Further, fire attacks are stopped by the rain, not the ability itself, so Mold Breaker can't override it. You lose the surprise factor of FF, but it's a much more reliable switch-in to fire-type users. EVs and IVs are basically self-explanatory, Genesect outspeeds more stuff with Timid than Modest and it doesn't want to take any more hits than it has to.
Further discussion question: Magic Guard Clefable is great in standard OU, even with Clefable's crap stats. Now that anything can use Magic Guard, has anyone found a viable user of a similar set in AAA? Deoxys-D has the movepool and defenses necessary, but it has fucking terrible typing. It seems like every OU mon with CM and recovery is Psychic-type except Clefable; meanwhile, nothing worthwhile that we can use gets Bulk Up and recovery.
Additional question: I've been running a Regenerator spam team to mixed success (I get about two misplays before the game becomes unwinnable). Does anybody else have experience with this playstyle? Good mons/cores to use for it?
And one final point: Putting Trick on PH walls lets you steal some Leftovers and toxic something through their Magic Bounce, but you risk getting an Assault Vest or a Choice item if you're not careful, and it's a slot you don't get to use for another move. Mixed success on my Curse PH Cofagrigus.