NU has an incredibly low amount of viable spinners, and having a Pokemon with such a fantastic Defence stat as Torkoal that has access to Rapid Spin makes it a great Pokemon.
It has 70 / 140 / 70 Defences, and 70 Special Defence is pretty good in NU. Definitely better than Tangela's 40. Anyway, this means that Torkoal can absorb many physical hits. According to Smogon, it can take Sawk and SD Samurott's attacks twice, and Kangaskhan can only 3HKO.
Torkoal also has access to Stealth Rock, meaning it can spin your opponent's hazards away and then set its own. It also has Lava Plume, which is pretty much a Fire-type equivalent to Scald, with 80 base power and a nifty 30% chance to burn, making it hard for physical attackers to switch into it; and if it does burn, its physical bulk is nearly unbreakable. Yawn can force switches and keep counters from killing Torkoal; this, on top of Lava Plume, makes Torkoal risky to switch into and can be hard to counter if you use him the correct way.
Shell Armor prevents critical hits from ruining its life, and Leftovers makes an attempt at recovery as Torkoal has no reliable recovery otherwise.
Torkoal @ Leftovers
Trait: Shell Armor
EVs: 248 HP / 252 Def / 8 SDef
- Lava Plume
- Stealth Rock
- Rapid Spin
Credit to Smogon for the set.