Because in fiction martial artists can break steel.
steel is weak to fire, water, ground, and fighting type moves.
Ice and Rock pokémon are weak against steel". Steel is weak against Fire, Fighting and Ground
Fire, fighting, and ground.
Steel types are weak against Fire, Ground, and Fighting types.
Steel types are weak against Ground, Fighting, and Fire.
Steel/Ground. It is weak to water, fire, fighting and ground.
Water, grass, ground, steel, ice, and fighting.
Fire, Fighting, Steel and Rock.
fire: effective against: steel, grass, bug, ice Weak against: Dragon, water, fire, rock Water: Effective against: rock, ground, fire Weak against: water, grass, ice, dragon Grass: Effective against: water, ground, rock Weak against: grass, fire Dark: Effective against: ghost, psychic Weak against: dark, fighting, rock, steel Fighting: Effective against: dark, steel, normal, ice, rock Weak against: bug, poison, flying, psychic Not-Affected: ghost Electric: Effective against: flying, water Weak against: dragon, grass, electric Not-Affected: rock, ground Ground: Effective against: poison, steel, electric, fire, rock Weak against: bug, grass Not-Affected: flying Flying: Effective against: grass, fighting, bug Weak against: electric, steel, rock Poison: Effective against: grass Weak against: ghost, rock, ground, poison Not-Affected: Steel Dragon: Effective against: dragon Weak against: steel Steel: Effective against: rock, ice Weak against: electric, water, fire, steel Ice: Effective against: grass, rock, flying, dragon, ground Weak against: water, steel, ice, fire Rock: Effective against: flying, fire, bug, ice Weak against: rock, ground, fighting, steel Ghost: Effective against: ghost psychic Weak against: dark, steel Not-Affected: normal Bug: Effective against: dark, psychic, grass Weak against: fighting, steel, fire, flying, ghost, poison Psychic: Effective against: fighting, poison Weak against: psychic, steel Not-Affected: dark
Rock-type Pokemon are weak against Water, Ground, Steel, Fighting and Grass-type attacks.
All ice types are weak against Rock, Steel, Fire and Fighting.
Fighting is super effective against Dark, Normal, Steel, Rock and Ice