[Foxy Grandpa]

Venomoth:
Venomoth is broken in the RU Tier, with access to Sleep Powder, Quiver Dance, and Tinted Lens it's just too much too much to handle. All of the pokemon who can handle it just get slept and set up on (The exception is Munchlax). You can't even wall it with resists due to tinted lens. IMO, it needs to go.

Omastar:
I would like to see Omastar in a tier without Venomoth. While it's power after a Shell Smash is ridiculous, the -1 to its defenses really hurt it. You can use White Herb but in my experiences, it sorely misses the extra power that Life Orb provides. Just as everyone else has said, it's outpaced by fast pokemon and Scarfers even after a Smash.

Gorrebyss and Huntail:
Although, Gorrebyss is a one trick pony, and is stopped by common phazers (Munchlax, Drapion, etc.) I think that it needs to go. While all it's supposed to do is SmashPass, it's just too threatening even before it passes the boosts. Huntail, while in a similar boat, doesn't deserve to be banned just yet. The main reason for this is that Huntail just doesn't have to movepool in order to be threatening. I would like to see how the tier plays out with just Huntail.

Yanmega:
While I personally don't believe that Yanmega is broken per say, I think that it is unhealthy for the metagame. Yes, it is walled by pokemon such as Munchlax, but it restricts offensive teams to run obscure checks such as Soundproof Electrode for example. Overall, it forces more teams to have a stallish nature and makes offense almost nonviable.

Ban:Venomoth, Yanmega, Gorrebyss
Do Not Ban:Omastar, Huntail