A-
A+
Skuntank shuts down so much cheese like and checks extremely potent breakers such as Gardevoir, Misdreavous, Haunter, and Duosion. Stacking these Ghosts and Psychics have shown to be a very powerful and legitimate playstyle and can even be known to overwhelm Skuntank, but these styles also show they completely destroy most balance-oriented teams that don't have Skuntank. Also Pursuit is broken.
B+
A-
Extremely potent lead with solid set diversity. Has positive MU's vs all the top tier dogs.
B
B+
Biased as its one of my favorite mons but its the only Volt Switch blocker and Charizard check in the tier, sets up Rocks reliably, spreads burns, and has a free 4th moveslot for HP Grass, Roar, Toxic, etc.
B
A-
Niche defensive Grass typing and Grass and Ghost immunity let this thing SD on a lot of bulky teams with very potent Grass and Ground coverage and great speed tier and longevity to continuously pressure slower bulky teams. Way better than some other SD mons like Pinsir or Zangoose.
A+
S
Serperior can come out on top of so many situations thanks to its speed and bulk, and abuse of Hidden Power, being able to surprise would-be checks with HP Psychic, Ice, or Ground, or sticking with Rock and still hitting most of the tier uncontested. Or you can use SubSeed and beat anything regardless. I've won way too many games just by Subbing up with Serp on a bulky water or a predicted status move and just breaking the whole tier open with only a +1/2 Overgrow-boosted Giga Drain.