I've applied myself over the past few days to finding a hard counter to Urshifu. A mon that, in one slot, can switch in to Urshifu, take a hit, and threaten it with a KO or with another method, such as PP stall or hazard set up. This mon should be able to live anything Urshifu can throw at it, bar lucky crits and other gimmicky tactics.
Short Answer: There isn't any.
During this time, I have almost exclusively been doing calcs and seeing mons that surprisingly live a lot of Urshifu. As a by-product of this search, I have produced a list of
every single pokemon that does not get 2HKOed by Urshifu's Close Combat or Wicked Blow. This is assuming they are max defense, max hp, plus defense nature and eviolite if applicable.
https://docs.google.com/document/d/1UUXQY9UtPwcJHhZHc3Uu8jEyHYkXgtUG1cNcdVjftG8/edit?usp=sharing
Some interesting facts:
Only 0.04% of non-ubers pokemon fit the criteria
Only 5 non-fairy types in the entire non-ubers meta fit the criteria
The tier with the highest amount of mons is not OU, but LC, with 4 and 6 mons respectively
Every pokemon on the list resists CC, only 2 don't resist Wicked Blow, but those mons are never crit by wicked blow
No pokemon have any chance of living 2 coverage moves from Urshifu. Shelmet and Togetic have a chance to live fire punch and poison jab respectively, but then urshifu can 2HKO with stone edge.
Most of these pokemon are not viable, but it was amusing for me to see which mons can live CC and WB.
On this note, I'd like to revisit my defensive Hawlucha set.
Hawlucha @ Heavy-Duty Boots
Ability: Limber
EVs: 252 HP / 252 Def / 4 SpD
Impish Nature
- Flying Press/Drain Punch
- Defog/Taunt/Drain Punch/U-turn
- Roost
- Defog/Taunt/Drain Punch/U-turn/Tailwind/Feather Dance
Looking at the moveset and strictly the movest, its literally mandibuzz with drain punch and Flying Press. Its great. Drain Puch provides recovery without letting up pressure, and Flying Press
combines STAB, which is amazing if you want to
OHKO Urshifu without investment. Heavy-Duty Boots is a must if you want to survive Urshifu while rocks are up. Feather Dance is a gimmick that can beat Bulk up Urshifus. It's not useless against other mons, either. Excadrill can't touch Hawlucha and gets 2HKOed by drain punch, and Adamant Rillaboom is
outsped even without any investment. I think most booms run adamant. Jollyboom only has a 21.4% chance to 2HKO with banded wood hammer. Rillaboom is 2HKOed by flying press. Bisharp, although rare, can deal only max 40% with iron head. Scizor is hard walled.
Alright, lets not kid ourselves. The only reason you'd ever have Hawlucha is to counter Urshifu in 1 slot. Great for Offensive teams who want a small core to fall back on. It won't be useless in a matchup without Urshifu, though, as it can do what mandibuzz and corviknight do, but worse. Hawlucha can even put in some work pivoting against faster mons. Overall, though, there is no fast walls in the metagame, and Hawlucha fits that Brilliantly
EDIT: I've noticed that I may have been putting the heat on a bit to much for the OU forum standards, so I'll take a little break. Catch you back when I get another jackpot of heat sets