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Lairon
No. 305 · Generation 3

Lairon

SteelRockRare

Shows up lost in Golden Canyon from floor 26. Evolves into Aggron at level 42.

Where to find it

RouteFloorsShows up
Golden CanyonCanyon SinkholesFloors 26 – 50Frequent
Golden CanyonCanyon SinkholesFloors 51 – 75Occasional
Golden CanyonCanyon SinkholesFrom floor 76Scarce
Forgotten RuinsSealed CryptFloors 26 – 50Frequent
Forgotten RuinsSealed CryptFloors 51 – 75Occasional
Forgotten RuinsSealed CryptFrom floor 76Scarce
Ember CraterMagma ChamberFloors 26 – 50Frequent
Ember CraterMagma ChamberFloors 51 – 75Occasional
Ember CraterMagma ChamberFrom floor 76Scarce
Frost GrottoDeep GlacierFloors 26 – 50Frequent
Frost GrottoDeep GlacierFloors 51 – 75Occasional
Frost GrottoDeep GlacierFrom floor 76Scarce
Storm PlantTurbine HallFloors 26 – 50Frequent
Storm PlantTurbine HallFloors 51 – 75Occasional
Storm PlantTurbine HallFrom floor 76Scarce

Frequency compares it with the other lost Pokémon on those floors.

How to get it

RescueFind it lost on the expedition and return with the Escape Rope. If the party faints or abandons first, it is lost, unless you already had it when you beat a guardian.
Poké BallIt can come out when you open a Poké Ball at the haven.
Day CareLeave one of its species at the Chansey Day Care with another that shares a type, or with Ditto. The egg is the species of one of the two.

Evolution

AronLevel 32LaironLevel 42Aggron

It evolves during the expedition, when it reaches that level, and at most 2 times per expedition. Back at the haven it is once again the Pokémon that set out.

Attacks

It has its type's basic attack, which fires on its own, and two specials you pick before leaving.

BasicBullet PunchFires on its own at the nearest enemy, and the shot follows it.SpecialFlash CannonHits everything in front of you in a line.SpecialIron DefenseCovers you with a shield for a few seconds: you take less damage and can't be stunned.SpecialMetal BurstYou take a guard stance: the next hit does no damage and you answer with a blast around you.SpecialGyro BallLaunches you towards where you aim and damages whatever you pass through.SpecialRock SlideBursts at the spot you aim at.SpecialHardenCovers you with a shield for a few seconds: you take less damage and can't be stunned.SpecialStealth RockPlaces a trap that goes off when an enemy steps on it.SpecialRolloutLaunches you towards where you aim and damages whatever you pass through.
UltimateSteel HammerIt charges as you fight. It wipes out the enemies around you.