At 430 BST, Lairon is firmly in pre-evolution territory. Evolve it into Aggron before bringing it to any serious fight.

What is Lairon weak to?

In FireRed & LeafGreen, watch for Blaziken (Fighting), Swampert (Ground), and Starmie (Water) when using Lairon. They all hit it super-effectively with STAB. Blaziken is the most dangerous since Fighting moves deal 4x damage. At base 40 Speed, Lairon won't outrun any of these threats so switching to a resist is usually the safer play.

How do you evolve Lairon?

In FireRed & LeafGreen, Aron evolves into Lairon at level 32. Lairon evolves into Aggron at level 42. Lairon is a middle-stage evolution in the Aron line.

What is the best ability for Lairon?

Sturdy prevents being KOed from full HP, leaving 1 HP instead. That's the one you want on Lairon. Heavy Metal is the hidden ability. Niche, but it has its uses. Rock Head works too if your team needs something different.

What role does Lairon play in battle?

Lairon is a physical attacker with base 90 Attack. Enough bulk to take a hit or two, too. Speed tells the real story. Base 40 Speed is low. Priority moves or Trick Room are the way to go. Fits the trick room role.

Lairon - Weakness, Evolution, Moveset, EVs & Stats

Physical

Trick Room

DTier

40Speed · Very Slow

Stats & Training

The stat bars tell the story: Defense carries everything and Speed's dead weight. But this Iron Armor Pokemon still yields 2 Defense EVs per fight on a slow 1.25M XP grind.

Base Stats

Above

HP60

Attack90

Defense140

Sp. Atk50

Sp. Def50

Speed40

Total430

Details

Catch Rate

Challenging90 / 255

Growth Rate

Slow1.25M XP

Height0.9 m

Weight120.0 kg

Base XP151

Abilities

Sturdy

Prevents being KOed from full HP, leaving 1 HP instead. Protects against the one-hit KO moves regardless of HP.

Rock Head

Protects against recoil damage.

Heavy MetalHANot in game

Doubles the Pokémon's weight.

EV Yield

HPAtkDef+2SpASpDSpe

Defense training target

Pokedex Entries

It habitually shows off its strength with the size of sparks it creates by ramming its steel body into boulders.

Lairon Weakness

Fighting, Ground, and Water moves hit Lairon for super-effective damage. Fighting and Ground hits land at 4x, so they're the biggest threat. The upside? Poison-type moves can't touch it at all. It resists 9 types, so it can switch into a lot of moves safely. Lairon's physical bulk (base 140 Def) helps cushion physical weakness hits, but special attackers are the bigger threat.

Lairon Weakness and Resistance Chart
Damage	Types
4x (Critical)	Fighting, Ground
2x (Weak)	Water
0.5x (Resist)	Ice, Psychic, Bug, Rock, Ghost, Dragon, Dark
0.25x (Resist)	Normal, Flying
0x (Immune)	Poison

Type ChartGood

3Weak

9Resist

1Immune

Score+4

Gen III Type Chart

Dark and Steel types added — Fairy does not exist yet
Moves are Physical or Special based on type, not per move

4xCritical

Fighting Ground

2xWeak

Water

½xResist

Ice Psychic Bug Rock Ghost Dragon Dark

¼xResist

Normal Flying

0xImmune

Poison

STAB (5)

Ice Rock Fire Flying Bug

How to Beat Lairon in FireRed & LeafGreen (Best Counters)

In FireRed & LeafGreen, Starmie can KO Lairon with Surf (164-193%). Claydol threatens a KO with Earthquake (134-159%).

Starmie WaterPsychic	A
Recommended Build AbilityNatural Cure ItemLeftovers NatureTimid Moves Rapid Spin Ice Beam Thunderbolt SurfSTAB Damage vs Lairon Rapid Spin 2-2% Ice Beam 27-32% Thunderbolt 54-64% Surf 2x 164-193%KO View Starmie builds →
Claydol GroundPsychic	A
Recommended Build AbilityLevitate ItemLeftovers NatureAdamant Moves Rapid Spin EarthquakeSTAB Explosion PsychicSTAB Damage vs Lairon Rapid Spin 3-3% Earthquake 4x 134-159%KO Explosion 14-16% Psychic 23-26% View Claydol builds →
Heracross BugFighting	B
Recommended Build AbilitySwarm ItemSalacberry NatureJolly Moves MegahornSTAB Rock Slide Swords Dance SubstituteUtility Damage vs Lairon Megahorn 28-32% Rock Slide 11-13% View Heracross builds →

FireRed & LeafGreen Evolution

Lairon sits between Aron and Aggron in this three-stage line. Not the final form yet. For breeding, slow to hatch with a decent partner pool via one egg group. So far, Defense got the biggest boost (+40 from Aron). The final form adds another 100 stats on top. View every chain in the Evolution Chart.

How to Evolve

3 Forms

#304Aron

Level 32

#305Lairon

Level 42

#306Aggron

Stat Comparison 3 Stages

Aron

SteelRock

Lairon

SteelRock

Aggron

SteelRock

60+10

70+10

ATK

90+20

110+20

DEF

100

140+40

180+40

SP.ATK

50+10

60+10

SP.DEF

50+10

60+10

SPE

40+10

50+10

BST

330D-Tier

430D-Tier+100

530C-Tier+100

ROLE

Balanced

Trick Room

Balanced

TYPE

Physical

Breeding

Moderate

Breed with Lairon to get Aron eggs using 49 partners from the Monster egg group. Notable egg moves include Body Slam, Endeavor, Smelling Salts and 1 more.

Egg Groups

Monster

Gender

♂50.0%♀50.0%

Hatch Time

35 cycles·8,995 steps

Slow~9 min with Flame Body

Egg Moves

4moves

Breed With (best first)

FireRed & LeafGreen Lairon Best Moveset

Best Build

No build content available for this Pokemon in Gen 3.

Try selecting a different game/generation filter, or check back later.

Moves

Don't skip the egg moves. Lairon picks up Body Slam and Endeavor only through breeding, and both fill gaps the natural movepool can't. STAB runs through Iron Tail and Rock Slide while Normal and Ground coverage and more adds range.

Level-Up Moves

Lv 1

Harden

D——30Normal

Lv 1

Headbutt

C7010015Normal

Lv 1

Mud-Slap

D2010010Ground

Lv 1

Tackle

—3510035Normal

Lv 4

Harden

D——30Normal

Lv 7

Mud-Slap

D2010010Ground

Lv 10

Headbutt

C7010015Normal

Lv 13

Metal Claw

—509535Steel

Lv 17

Iron Defense

———15Steel

Lv 21

Roar-6

C——20Normal

Lv 25

Take Down

C908520Normal

Lv 29

Iron Tail

C1007515Steel

Lv 37

Protect+4

C——10Normal

Lv 45

Metal Sound

——8540Steel

Lv 53

Double-Edge

C12010015Normal

TM Moves

TM40

Aerial Ace

D60—20Flying

TM45

Attract

——10015Normal

HM01

Cut

—509530Normal

TM28

Dig

—6010010Ground

TM32

Double Team

———15Normal

TM26

Earthquake

C10010010Ground

TM42

Facade

C7010020Normal

TM21

Frustration

——10020Normal

TM10

Hidden Power

—6010015Normal

TM23

Iron Tail

C1007515Steel

TM17

Protect+4

C——10Normal

TM18

Rain Dance

C——5Water

TM44

Rest

C——10Psychic

TM27

Return

D—10020Normal

TM05

Roar-6

C——20Normal

HM06

Rock Smash

—2010015Fighting

TM39

Rock Tomb

—609510Rock

TM37

Sandstorm

———10Rock

TM43

Secret Power

—7010020Normal

TM34

Shock Wave

—60—20Electric

HM04

Strength

—8010015Normal

TM11

Sunny Day

C——5Fire

TM06

Toxic

C—8510Poison

TM03

Water Pulse

—6010020Water

Egg Moves

Egg

Body Slam

C8510015Normal

Egg

Endeavor

D—1005Normal

Egg

Smelling Salts

—7010010Normal

Egg

Stomp

D6510020Normal

Tutor Moves

Tut

Tutor

Body Slam

C8510015Normal

Tutor

Double-Edge

C12010015Normal

Tutor

Mimic

———10Normal

Tutor

Rock Slide

C759010Rock

Tutor

Substitute

C——10Normal

How to Get Lairon in FireRed & LeafGreen

No wild encounters for Lairon in FireRed & LeafGreen. Bring Aron over from Ruby, Emerald, or Brilliant Diamond, then level through the stages. Each step in the chain is laid out below.

How to Obtain Lairon in FireRed & LeafGreen

Step 1Obtain Aron
Catch in the wild in:
RubyWalking · Granite Cave EmeraldWalking · Granite Cave
Then trade to FireRed & LeafGreen to continue the evolution chain.
Also found in:
Diamond Platinum White Black 2 X Omega Ruby
Train until Level 32
Step 2Lairon ✓

Lairon Guide

At 430 BST, Lairon is firmly in pre-evolution territory. Evolve it into Aggron before bringing it to any serious fight.
In FireRed & LeafGreen, watch for Blaziken (Fighting), Swampert (Ground), and Starmie (Water) when using Lairon. They all hit it super-effectively with STAB. Blaziken is the most dangerous since Fighting moves deal 4x damage. At base 40 Speed, Lairon won't outrun any of these threats so switching to a resist is usually the safer play.
In FireRed & LeafGreen, Aron evolves into Lairon at level 32. Lairon evolves into Aggron at level 42. Lairon is a middle-stage evolution in the Aron line.
Sturdy prevents being KOed from full HP, leaving 1 HP instead. That's the one you want on Lairon. Heavy Metal is the hidden ability. Niche, but it has its uses. Rock Head works too if your team needs something different.
Lairon is a physical attacker with base 90 Attack. Enough bulk to take a hit or two, too. Speed tells the real story. Base 40 Speed is low. Priority moves or Trick Room are the way to go. Fits the trick room role.

Game Availability

Debuting in Ruby & Sapphire, Lairon appears in 15 games across 8 generations. A reliable presence in most mainline games, typically found through catching or hatching as a base form.

Click a game to view version-specific details

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