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
C
Attack90
B
Defense140
A
Sp. Atk50
D
Sp. Def50
D
Speed40
D
Total430
Details
Catch Rate
Challenging90 / 255
Growth Rate
Slow1.25M XP
Height0.9 m
2'11"Small
Weight120.0 kg
264.6 lbsHeavy
Base XP151
Average
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
DamageTypes
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
FightingGround
2xWeak
Water
½xResist
IcePsychicBugRockGhostDragonDark
¼xResist
NormalFlying
0xImmune
Poison
STAB (5)
IceRockFireFlyingBug
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
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 →

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
Aron
#304Aron
32
Level 32
Lairon
#305Lairon
42
Level 42
Aggron
#306Aggron
Stat Comparison 3 Stages
Aron
SteelRock
Lairon
SteelRock
Aggron
SteelRock
HP
50
60+10
70+10
ATK
70
90+20
110+20
DEF
100
140+40
180+40
SP.ATK
40
50+10
60+10
SP.DEF
40
50+10
60+10
SPE
30
40+10
50+10
BST
330D-Tier
430D-Tier+100
530C-Tier+100
ROLE
Balanced
Trick Room
Balanced
TYPE
Physical
Physical
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)
venusaurcharizardblastoisenidokingmeganiumferaligatrampharossceptileswampertslowbrorhydonslowking
12 of 49·

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

TM
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
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

  1. Aron
    Step 1Obtain Aron

    Catch in the wild in:

    RubyWalking · Granite CaveEmeraldWalking · Granite Cave

    Then trade to FireRed & LeafGreen to continue the evolution chain.

    Also found in:

    DiamondPlatinumWhiteBlack 2XOmega Ruby
  2. Lairon
    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

Was this page helpful?
Thanks for your feedback!
Want to tell us more?
What was most useful?
What could be improved?
Thanks for your feedback