In FireRed & LeafGreen, Aggron has a 530 base stat total and ranks as C-Tier: a niche pick in FireRed & LeafGreen's meta. It works best as a balanced. Rock Slide with Leftovers is the standard set.

Does Aggron mega evolve?

Mega Evolution isn't available in FireRed & LeafGreen, but Aggron does have a Mega form in Gen 6-7 games (X/Y, ORAS, Sun/Moon). Mega Aggron hits 630 BST.

What is Aggron weak to?

In FireRed & LeafGreen, Aggron's biggest threats include Machamp (Fighting), Golem (Ground), and Swampert (Water), all carrying super-effective STAB moves. Machamp is the most dangerous since Fighting moves deal 4x damage. Aggron has enough bulk to absorb a hit, but don't push the matchup. Pivot to a teammate that resists.

What is the best ability for Aggron?

Sturdy is the go-to ability for Aggron. It prevents being KOed from full HP, leaving 1 HP instead. Its hidden ability Heavy Metal can work in specific setups. Rock Head is the other option. Pick based on what your team needs.

What role does Aggron play in battle?

In FireRed & LeafGreen, Aggron fills the balanced role. It's a physical attacker with base 110 Attack. Base 50 Speed is low. Priority moves or Trick Room are the way to go. And it's tanky enough to absorb a few hits.

Aggron - Weakness, Evolution, Moveset, EVs & Stats

Physical

Balanced

CTier

50Speed · Slow

Stats & Training

Aggron's all-in on Defense at the expense of Speed. The physical lean is obvious from the bars. Yields 3 Defense EVs and follows a slow 1.25M XP grind.

Base Stats

High

HP70

Attack110

Defense180

Sp. Atk60

Sp. Def60

Speed50

Total530

Details

Catch Rate

Challenging45 / 255

Growth Rate

Slow1.25M XP

Height2.1 m

Weight360.0 kg

Base XP239

Abilities

SturdyPopular

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

Rock HeadPopular

Protects against recoil damage.

Heavy MetalHANot in game

Doubles the Pokémon's weight.

EV Yield

HPAtkDef+3SpASpDSpe

Strong Defense training target

Pokedex Entries

It claims a large mountain as its sole territory. It mercilessly thrashes those that violate its space.

Aggron Weakness

Type-wise, Aggron takes extra damage from Fighting, Ground, and Water. Watch out for Fighting and Ground attacks, those deal 4x damage. Poison moves do nothing thanks to a full immunity. 9 resistances give it solid defensive coverage on top of that. Aggron's physical bulk (base 180 Def) helps cushion physical weakness hits, but special attackers are the bigger threat.

Aggron 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 Aggron in FireRed & LeafGreen (Best Counters)

In FireRed & LeafGreen, Aerodactyl can KO Aggron with Earthquake (102-120%). Starmie threatens a KO with Surf (112-132%).

AerodactylThreatens with Earthquake, outspeeds RockFlying	A
Recommended Build AbilityRockhead ItemChoice Band NatureJolly Moves Earthquake Rock Slide Double Edge Hidden Power Flying Damage vs Aggron Earthquake 4x 102-120%KO Rock Slide 14-17% Double Edge 8-9% View Aerodactyl builds →
Starmie WaterPsychic	A
Recommended Build AbilityNatural Cure ItemLeftovers NatureTimid Moves Rapid Spin Ice Beam Thunderbolt SurfSTAB Damage vs Aggron Rapid Spin 1-1% Ice Beam 19-22% Thunderbolt 37-44% Surf 2x 112-132%KO View Starmie builds →
Heracross BugFighting	B
Recommended Build AbilitySwarm ItemSalacberry NatureJolly Moves MegahornSTAB Rock Slide Swords Dance SubstituteUtility Damage vs Aggron Megahorn 17-20% Rock Slide 7-8% View Heracross builds →

FireRed & LeafGreen Evolution

Aggron is the final form in a three-stage chain from Aron through Lairon. Breeding this form produces Aron eggs (slow to hatch). Evolving from Aron gave Aggron the biggest boost in Defense (+80), bringing the total to 530 stats. 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 Aggron 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 Aggron Best Moveset

This build takes hits and hits back. Leftovers provides passive recovery each turn, Sturdy supports the gameplan, and max HP and Attack EVs mean Aggron doesn't crumble to chip damage. Plus utility options backing it up.

Best Build

Situational pick

Physical Tank

Ability

Sturdy

Item

LeftoversSUSTAIN

Best Nature for Aggron

Adamant+ATK

Aggron best EVs are Attack and HP

EVs

Atk

Spe

Physical Tank Moveset

Rock SlideSTAB
Focus Punch
Thunder Wave
SubstituteUtility

Recommended Teammates

TyranitarGood

CelebiDecent

SwampertDecent

Moves

Hard to wall, honestly. Aggron threatens 10 types beyond its own STAB, with Normal and Ground standing out. Pair that with Iron Tail and Rock Slide and switchins need to think twice.

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

B1007515Steel

Lv 37

Protect+4

C——10Normal

Lv 50

Metal Sound

——8540Steel

Lv 63

Double-Edge

B12010015Normal

TM Moves

TM40

Aerial Ace

C60—20Flying

TM45

Attract

——10015Normal

TM14

Blizzard

D120705Ice

TM31

Brick Break

C7510015Fighting

HM01

Cut

—509530Normal

TM28

Dig

—6010010Ground

TM32

Double Team

———15Normal

TM02

Dragon Claw

C8010015Dragon

TM26

Earthquake

A10010010Ground

TM42

Facade

C7010020Normal

TM38

Fire Blast

D120855Fire

TM35

Flamethrower

D9510015Fire

TM01

Focus Punch-3

A15010020Fighting

TM21

Frustration

——10020Normal

TM10

Hidden Power

—6010015Normal

TM15

Hyper Beam

C150905Normal

TM13

Ice Beam

D9510010Ice

TM23

Iron Tail

B1007515Steel

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

TM22

Solar Beam

C12010010Grass

HM04

Strength

—8010015Normal

TM11

Sunny Day

C——5Fire

HM03

Surf

D9510015Water

TM12

Taunt

C—10020Dark

TM25

Thunder

D1207010Electric

TM24

Thunderbolt

D9510015Electric

TM06

Toxic

C—8510Poison

TM03

Water Pulse

—6010020Water

Egg Moves

Egg

Body Slam

C8510015Normal

Egg

Endeavor

D—1005Normal

Egg

Smelling Salts

—7010010Normal

Egg

Stomp

C6510020Normal

Tutor Moves

Tut

Tutor

Body Slam

C8510015Normal

Tutor

Counter-5

D—10020Fighting

Tutor

Double-Edge

B12010015Normal

Tutor

Mega Kick

—120755Normal

Tutor

Mega Punch

—808520Normal

Tutor

Mimic

———10Normal

Tutor

Rock Slide

S759010Rock

Tutor

Seismic Toss

D—10020Fighting

Tutor

Substitute

A——10Normal

Tutor

Thunder Wave

A—10020Electric

How to Get Aggron in FireRed & LeafGreen

Aggron can't be caught in FireRed & LeafGreen. Transfer Aron from Ruby, Emerald, or Brilliant Diamond and evolve through the 3-stage chain to get it. The step cards below map the full chain.

How to Obtain Aggron 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 2Evolve into Lairon
Catch in the wild in:
RubyWalking · Granite Cave EmeraldWalking · Granite Cave
Also found in:
Diamond Platinum White Black 2 X Omega Ruby
Train until Level 42
Step 3Aggron ✓

Aggron Guide

In FireRed & LeafGreen, Aggron has a 530 base stat total and ranks as C-Tier: a niche pick in FireRed & LeafGreen's meta. It works best as a balanced. Rock Slide with Leftovers is the standard set.
Mega Evolution isn't available in FireRed & LeafGreen, but Aggron does have a Mega form in Gen 6-7 games (X/Y, ORAS, Sun/Moon). Mega Aggron hits 630 BST.
In FireRed & LeafGreen, Aggron's biggest threats include Machamp (Fighting), Golem (Ground), and Swampert (Water), all carrying super-effective STAB moves. Machamp is the most dangerous since Fighting moves deal 4x damage. Aggron has enough bulk to absorb a hit, but don't push the matchup. Pivot to a teammate that resists.
Sturdy is the go-to ability for Aggron. It prevents being KOed from full HP, leaving 1 HP instead. Its hidden ability Heavy Metal can work in specific setups. Rock Head is the other option. Pick based on what your team needs.
In FireRed & LeafGreen, Aggron fills the balanced role. It's a physical attacker with base 110 Attack. Base 50 Speed is low. Priority moves or Trick Room are the way to go. And it's tanky enough to absorb a few hits.

Game Availability

Aggron first appeared in Ruby & Sapphire and spans 15 games across 8 generations. It later gained a Mega form in Generation 6, adding new dimensions to its competitive identity.

Click a game to view version-specific details

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