Steel-type Pokémon are weak to three attack types: fire, fighting, and ground moves deal super-effective damage to them in the mainline games and in Pokémon GO.

Core weakness answer

  • Fire-type moves deal 2×2\times 2× damage to Steel Pokémon, “melting” their defenses.
  • Fighting-type moves are also super effective and are one of the most common offensive types in competitive play.
  • Ground-type moves hit Steel super effectively and are widely available on many strong attackers.

Extra quick facts

  • Steel has only these three weaknesses, which is part of why it is known as a very strong defensive type.
  • In return, Steel resists a long list of types (like Normal, Flying, Grass, Ice, Psychic, Rock, Dragon, Fairy, and others) and is immune to Poison, making it hard to take down without those key weaknesses.

Information gathered from public forums or data available on the internet and portrayed here.