One day I was looking for a wall and the first non-legend/mythic on the competitive pokedex was Shuckle. I know he has high defense, but his hp is so low that I never considered him as a wall. Is this a meme or is he actually good?
Long story short, no, Shuckle isn't a good wall in the tiers it is utilized in. It's primarily used as a lead to set up Sticky Web and Stealth Rocks, and usually doesn't stay in the field for too long. There are much better walls to use in the formats that Shuckle is valid in, which all outclass it as a wall. My reasoning behind Shuckle being a bad wall are as followed:
I wouldn't recommend Shuckle as its low HP makes those defences useless so I would recommend Ferrothorn as its quite bulky on both sides and has access to more hazards with a better hp stats combined with its Grass/Steel typing not having that many weaknesses were as Shuckle has a lot of weaknesses and lack of recovery unlike Ferrothorn, Overall my advice would be to use Ferrothorn as it can do everything what Shuckle can do way better. Hopefully, this helps :)
A moveset for Ferrothorn
Ferrothorn @ Leftovers Ability: Iron Barbs EVs: 252 HP / 252 Def / 4 Atk Nature:Impish (+Defense -Special Attack) -Stealth Rock -Leech Seed -Spikes -Gyro Ball