Iron Tail

Iron Tail is a Steel-type move introduced in Generation 2.

Values by generation

From PokeAPI's change history. Up to Generation 3, physical or special depends on the type. Highlighted cells changed from the previous generation.

Generation	Type	Category	Power	Accuracy	PP	Priority
Generation 2	Steel	Physical	100	75	15	+0
Generation 3	Steel	Physical	100	75	15	+0
Generation 4	Steel	Physical	100	75	15	+0
Generation 5	Steel	Physical	100	75	15	+0
Generation 6	Steel	Physical	100	75	15	+0
Generation 7	Steel	Physical	100	75	15	+0
Generation 8	Steel	Physical	100	75	15	+0
Generation 9	Steel	Physical	100	75	15	+0

Gold / Silver · Crystal	An attack that may reduce DEFENSE.
Ruby / Sapphire · Emerald	Attacks with a rock-hard tail. May lower DEFENSE.
FireRed / LeafGreen	An attack with a steel-hard tail. It may lower the foe’s DEFENSE stat.
Diamond / Pearl · Platinum · HeartGold / SoulSilver	The foe is slammed with a steel-hard tail. It may also lower the target’s Defense stat.
Black / White · Black 2 / White 2	The target is slammed with a steel-hard tail. It may also lower the target’s Defense stat.
X / Y · Omega Ruby / Alpha Sapphire · Sun / Moon · Ultra Sun / Ultra Moon · Let’s Go, Pikachu! / Let’s Go, Eevee! · Sword / Shield	The target is slammed with a steel-hard tail. This may also lower the target’s Defense stat.
Legends: Arceus	The target is slammed with a steel-hard tail. This may also lower the target’s defensive stats.
Scarlet / Violet	The target is slammed with a steel-hard tail. This may also lower the target's Defense stat.

Gold / Silver · Crystal · Ruby / Sapphire · Emerald · Colosseum · XD · FireRed / LeafGreen · Diamond / Pearl · Platinum · HeartGold / SoulSilver	TM23
Let’s Go, Pikachu! / Let’s Go, Eevee!	TM19
Sword / Shield	TR31
Legends: Z-A	TM87

All versions combined; see each Pokémon's page for game-by-game details.

Sources : PokeAPI (moves, move_changelog, move_flavor_text, pokemon_moves, machines)