It's advised to send in Ferrothorn on a Pokemon that does not really threaten it, such as Azumarill, Chansey, opposing Ferrothorn, Slowbro, or Suicune, and proceed to set up Stealth Rock or Spikes. Its power is far too low for raids, and its moveset options aren't the best.
Ferrothorn appears to be based on durian plants. Ferrothorn can be taught these attacks in Pokémon Sword & Shield from move tutors (details): Ferrothorn is compatible with these Technical Machines in Pokémon Sword & Shield: Ferrothorn is compatible with these Technical Records in Pokémon Sword & Shield. Its vines resemble military flails. 1 Spawn Rates; 2 Drops; 3 Stats; 4 Type Effectiveness; 5 Moves. Cutoff numbers refer to Glicko ratings on Pokemon Showdown. Stats for unreleased Mega Evolutions are speculative. 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