Where to Find Iron Thorns in ‘Pokémon Scarlet’ and ‘Violet’

Just like Sandy Shocks, the Paradox form of Magneton, you can find Iron Thorns just outside of Research Center No. 2. Leave this building and go directly to the left, and Iron Thorns will likely spawn in the grassy area below the steep, rocky incline.

With the many glitches the game has, it’s best to stand in one spot and wait for the Pokémon to spawn around you. Here is where you should find Iron Thorns, but as it has such a low spawn rate, you may need to leave the area and come back.

Source: https://www.distractify.com/p/where-to-find-iron-thorns-pokemon-scarlet-violet