Nosepass

Sturdy
OHKO moves will fail.
Magnet Pull
Prevents Steel Pokémon from switching. Increases the chance of encountering a Steel Pokémon in the wild.
Type Tier
Rock NU
Statistics
Min- Min Max Max+
HP
30
- 201 264 -
Atk
45
113 126 189 207
Def
135
275 306 369 405
SpA
45
113 126 189 207
SpD
90
194 216 279 306
Spe
30
86 96 159 174
Name Item Nature

Skarmory counter

Leftovers Relaxed / Bold
Moveset EVs
~ Thunderbolt / Thunder
~ Taunt
~ Mimic / Thunder Wave / Fire Punch
~ Explosion / Fire Punch
252 HP / 4 Def / 252 SpA

A magnificent Skarmory counter. Taunt its Whirlwinds, and proceed to Thunderbolt it to pieces. Drill Peck does nothing against its 135 base Defense. Mimic is to take Spikes from Skarmory. After you kill Skarmory, Explode or something. That is the full extent of Nosepass' abilities. Fire Punch allows you to do something similar to Forretress, especially Hidden Power Ghost or Zap Cannon or whatever types of Forretress they happen to have that isn't Earthquake, and even if they have Earthquake, you kill it faster with Fire Punch than it kills you with Earthquake. If they lack Earthquake, however, you can use Mimic easier.

Other Options

Zap Cannon can paralyze stuff while doing a good 25% to Milotic and Block can uh... keep Blissey from switching out while you Explode. Earthquake can beat Magneton, but Thunderbolt 2HKOs Nosepass.

EVs

Special Attack and Attack. If you lack a physical move, obviously Attack EVs are wasted, and thus 252 HP / 252 Special Attack is a good spread. Relaxed could work to boost that nice Defense stat (Bold without Attack).

Opinion

Notice a surge of Weezing replacing Skarmory? Yeah, me neither.

Counters

Anything that isn't Skarmory and sometimes Forretress.