Is there such thing as a mon, no matter how niche, that fully counters the standard icicle crash/flare blitz/EQ/u-turn banded darm?
avalugg is pretty decent, and also gets rapid spin.
Since I just recently learned that Dynamax is gone, you COULD use something like a pokemon with the item Eject Button that doesn't mind taking a hit from Darmanitan and switch into your item Choice Scarf Dugtrio. I don't have any good examples, but when I play in the Ubers tier, my Pokemon team is not great for lead choices when I see a Darmanitan at Team Preview. So I added Choice Scarf (Scarf for short) Dugtrio on my team with Stone Edge and run Adamant Nature, so I can hopefully hit my attack move and faint the Darmanitan turn 1.
I guess good pokemon with Eject Button could be feasiable Water types like Toxapex or Rotom-Wash, or Fire Types like Rotom-Heat, since they are great for it's usual movepool choices Icicle Crash/Flare Blitz/Earthquake/U-Turn. I am open to more ideas for that subject, I just believe Darmanitan (Especially Choice Band ones) are a bit out of reach in terms of reliable "switch-ins" because of it's mobility and attack moves hitting harder than a truck.
True, this does sound pretty reliable. Toxapex is probably the best mon for this strategy, since taking 50% on rotom sucks. I don't like using toxapex or dugtrio though :/

























