Yanmega is extremely powerful, the few pokemon that can check it are just eviolite mons and/or don't have much use outside of checking Yanmega. All of them lack reliable recovery and can be worn down pretty easily. Yanmega can also easily muscle through teams.
It's not it's sweeping potential that makes Venomoth so threatening, it's the fact that it can easily set up quiver dances and pass it away via baton pass thanks to it's decent bulk and Sleep Powder. You practically have to carry multiple phazers to reliably stop Venomoth or phazers with sleep talk, which isn't as good of a move as it used to be. Venomoth also has a surprisingly good attacking prowess.
Gorrebyss and Huntail: Ban
Shell Smash+Baton Pass is just too much for this tier, especially with all the threatening swepers and the fact Gorrebyss+Huntail can easily sweep themselves. Just banning Gorrebyss won't really solve the problem much as Huntail is nearly as good as Gorrebyss at it's job, just a little weaker on the special side.
Omastar: Do not ban
While I think everyone who is saying Omastar should not be banned are really under-estimating Omastar (It outspeeds one of the most common scarfers who has a respectable base 95 speed, Krookodile after 1 shell smash.), I don't think it's broken. It has it's fair share of counters: Poliwrath, Hitmonchan, Slowking, Gurdurr, Ferroseed, Gallade, Hariyama, Clefable (Especially unaware varients) and Lanturn. Also, it has some trouble setting up. The fact that there are quite a few good mach punch also doesn't help Omastar.
Last edited by DTC; Oct 4th, 2011 at 11:23:55 PM.