Thx for the advice, Dozer. That's a really good idea!
I completely forgot he could learn Amnesia until I saw Bulbapedia last night....
Getting Regigigas' ability removed will make it so that after he switches out and back in, his attack/speed will be normal and not halved.
furthermore, in doubles, we can now use ubers that are as good or better than regigig and slaking, while not needing as nearly as much support and are without the horrendous disability.
Slaking has a few things that most Ubers don't have. The element of surprise, he is a bit more stable than most Ubers w/ his gargantuan HP (150/100/65), he can cripple enemies w/ encore, EQ from 160 attack is nothing to laugh at, neither is STAB Return.
They only need one turn of support if your using Gastro Acid, and 3 if your usin Skill Swap (Skill Swap lets you pass Traunt/Slow Start to the enemy.
Encore and Flail can also work horrifyingly well, considering he's faster then all but 2 of the Pokemon commonly used (Palkia, who he ties w/, and Mewtwo).
This is how Slaking would handle the Pokemon in the threat list shown earlier in the thread. I wouldn't recommend using the elemental Punches unless it's really needed to aid the team your using. Flinging an Iron Ball can also be used to stop Mewtwo and Giratina in their tracks, but it takes some prediction and can only be used once. And if they Protect, then you just wasted an Iron Ball and a move slot. Punishment could work well, but there won't be too many stat boosters in the VGC. Hammer Arm isn't recommended, mainly because of the speed drop. Amnesia is an option if you get a chance to set it up. Priority kills Flail, but that's only a worry w/ Rayquaza, RP Groudon, Metagross, Toxicroak, Abomasnow,and Scizor. Because there are so many priority users in VGC, Flail (and Reversal) are not recommended. Yawn and Encore are options if you could set them up. Encore on Slaking will cause your opponents Jaw to Drop.
Kyogre-
Return, Thunder Punch
Groudon-
Return, Ice Punch
Rayquaza-
Return, Ice Punch, Rock Slide
Mewtwo-
Return, Night Slash, Sucker Punch, Shadow Claw
Metagross-
EQ, Fire Punch
Smeargle-
Anything not Shadow Claw, sleep is eminent if Slaking's outrun. He can Taunt Smeargle.
Toxicroak-
EQ, Fire Punch, Arial Ace (I wouldn't recommend it...)
Togekiss-
Return, EQ, Rocklside T-Punch, Ice Punch
Weavile-
Return, Rock Slide, Fire Punch
Ludicolo-
Return, Arial Ace (once again, avoid using it...)
Dialga-
EQ, Low Kick
Palkia-
Return
Abomasnow-
Return, Rock Slide, Fire Punch
Zapdos-
Rock Slide, Return, Ice Punch
Lugia-
Rock Slide, Sucker Punch, Night Slash, Shadow Claw, Ice Punch, T-Punch, Return, Taunt
Ho-oh-
Return, Rock Slide, T-Punch
Giratina-
Shadow Claw, Sucker Punch, Night Slash, Ice Punch
Giratina-O-
See the above
Blissey-
Retrun, Low Kick, EQ
Tyranitar-
EQ, Low Kick
Latias-
Ice Punch, Return, Shadow Claw, Night Slash, Taunt
Latios-
All the above +
Sucker Punch - Taunt
Garchomp-
Ice Punch, Return
Kingdra-
Return
Shiftry-
Fire Punch (best option, Shiftry is usually in the sun), Return, Ice Punch, Low Kick to some extent, Protect when you think he's ready to Explode.
Jumpluff-
Ice Punch, Return, Fire Punch (same as Shiftry), Taunt
Exeggutor-
Ice Punch, Fire Punch, Return, Protect if you think it will Explode.
Gengar-
Night Slash, Shadow Claw, Sucker Punch.
Trick is annoying. Protect if you think it has Explosion.
Snorlax-
Low Kick, Return
Infernape-
Should avoid. EQ, that's about it. Chances are it will be a OHKO, but Slaking will usually be outrun.
Shedinja -
Rock Slide, Night Slash, Fire Punch, Sucker Punch
Cresselia -
Night Slash, Taunt, Shadow Claw, Return. Not easy to OHKO....
Hippowdon -
Taunt, than spam Ice Punch/Return.
Clefable -
Return
Azelf -
Protect, Taunt, Sucker Punch, Shadow Claw, Night Slash
Heracross
- Arial Ace, Fire Punch
BTW, it has been revealed by the American Official Pokemon website that the VGC will be held in June, 2010. They also mentioned it's in Indianapolis.