Hoenn's signature tank, Aggron's Rock Head eliminates Double-Edge recoil and Steel/Rock bulk with 110 Attack earns it B-Tier in Ruby & Sapphire.
Ability 1SturdyAbility 1Prevents being KOed from full HP, leaving 1 HP instead. Protects against the one-hit KO moves regardless of HP.Ability 2Rock HeadAbility 2Protects against recoil damage.
530HP70Attack110Defense180Speed50Sp.Def60Sp.Atk60
Aron
Lairon
Aggron
Weak to
Physical
Balanced
50Speed · Slow

Is Aggron Good in Ruby & Sapphire Playthrough?

Steel/Rock with enormous Defense. AbilityRock Head means MoveDouble-Edge has no recoil drawback. Steven uses Aggron as part of his team, and having your own matches that benchmark. Handles Winona, Glacia, and most physical attackers. The 4x Fighting and Ground weaknesses are the constant vulnerability.

StrongGoodEvenToughBadGETEEEGTGEGGERoxanneGym 1AronCatchableBrawlyGym 2WattsonGym 3FlanneryGym 4NormanGym 5WinonaGym 6LaironEvolveTate & LizaGym 7WallaceGym 8AggronEvolveSidneyE4PhoebeE4GlaciaE4DrakeE4StevenChamp*
Roxanne
Gym 1
Good

Aron has the type edge here and should clean up Roxanne's team.

You Win
Geodude
Lv 14
RockGround
Rock Head
TackleDefense CurlRock ThrowRock Tomb
You Win
Nosepass
Lv 15
Rock
Sturdy
TackleHardenRock ThrowRock Tomb
Brawly
Gym 2
Even

Aron trades roughly evenly with Brawly's team.

Risky
Machop
Lv 17
Fighting
Guts
LeerKarate ChopSeismic TossBulk Up
Even
Makuhita
Lv 18
Fighting
Thick Fat
Arm ThrustKnock OffSand AttackBulk Up
Wattson
Gym 3
Tough

Wattson's typing presses Aron's defenses.

Risky
Magnemite
Lv 22
ElectricSteel
Magnet Pull
SupersonicSonic BoomThunder ShockThunder Wave
Even
Voltorb
Lv 20
Electric
Soundproof
RolloutSelf DestructSparkSonic Boom
Risky
Magneton
Lv 23
ElectricSteel
Magnet Pull
SupersonicSonic BoomShock WaveThunder Wave
Flannery
Gym 4
Even

Aron trades roughly evenly with Flannery's team.

You Win
Slugma
Lv 26
Fire
Magma Armor
OverheatSmogLight ScreenSunny Day
You Win
Slugma
Lv 26
Fire
Magma Armor
FlamethrowerRock SlideLight ScreenSunny Day
Risky
Torkoal
Lv 28
Fire
White Smoke
OverheatBody SlamFlailAttract
Norman
Gym 5
Even

Aron trades roughly evenly with Norman's team.

Even
Slaking
Lv 28
Normal
Truant
EncoreFacadeYawnFeint Attack
Even
Vigoroth
Lv 30
Normal
Vital Spirit
SlashFeint AttackFacadeEncore
Risky
Slaking
Lv 31
Normal
Truant
Focus PunchSlack OffFacadeFeint Attack
Winona
Gym 6
Even

Aron trades roughly evenly with Winona's team.

You Win
Swellow
Lv 31
NormalFlying
Guts
Quick AttackAerial AceDouble TeamEndeavor
Even
Pelipper
Lv 30
WaterFlying
Keen Eye
Water GunSupersonicProtectAerial Ace
Even
Skarmory
Lv 32
SteelFlying
Keen Eye
Sand AttackFury AttackSteel WingAerial Ace
Even
Altaria
Lv 33
DragonFlying
Natural Cure
EarthquakeDragon BreathDragon DanceAerial Ace
Tate & Liza
Gym 7
Good

Lairon has the type edge here and should clean up Tate & Liza's team.

You Win
Lunatone
Lv 42
RockPsychic
LevitateImmune to Ground attacks
Light ScreenPsychicHypnosisCalm Mind
You Win
Solrock
Lv 42
RockPsychic
LevitateImmune to Ground attacks
Sunny DaySolar BeamPsychicFlamethrower
Wallace
Gym 8
Tough

Wallace's team hits Lairon's weaknesses hard.

Even
Luvdisc
Lv 40
Water
Swift Swim
Water PulseAttractSweet KissFlail
Avoid
Whiscash
Lv 42
WaterGround
Oblivious
Rain DanceWater PulseAmnesiaEarthquake
You Win
Sealeo
Lv 40
IceWater
Thick Fat
EncoreBody SlamAurora BeamWater Pulse
Risky
Seaking
Lv 42
Water
Swift Swim
Water PulseRain DanceFury AttackHorn Drill
Risky
Milotic
Lv 43
Water
Marvel Scale
Water PulseTwisterRecoverIce Beam
Sidney
Elite Four
Good

Aggron has the type edge here and should clean up Sidney's team.

You Win
Mightyena
Lv 46
Dark
Intimidate
RoarTake DownSand AttackCrunch
You Win
Shiftry
Lv 48
GrassDark
Chlorophyll
Fake OutDouble TeamSwaggerExtrasensory
You Win
Cacturne
Lv 46
GrassDark
Sand Veil
Leech SeedFeint AttackNeedle ArmCotton Spore
Even
Sharpedo
Lv 48
WaterDark
Rough Skin
CrunchSwaggerSurfSlash
You Win
Absol
Lv 49
Dark
Pressure
Aerial AceSnatchSwords DanceSlash
Phoebe
Elite Four
Even

Aggron trades roughly evenly with Phoebe's team.

You Win
Dusclops
Lv 48
Ghost
Pressure
Shadow PunchConfuse RayCurseFuture Sight
Even
Banette
Lv 49
Ghost
Insomnia
Shadow BallSpiteWill O WispFeint Attack
Even
Sableye
Lv 50
DarkGhost
Keen Eye
Shadow BallPsychicAttractFeint Attack
Even
Banette
Lv 49
Ghost
Insomnia
Shadow BallPsychicToxicSkill Swap
Even
Dusclops
Lv 51
Ghost
Pressure
Shadow BallIce BeamConfuse RayEarthquake
Glacia
Elite Four
Good

Aggron has the type edge here and should clean up Glacia's team.

You Win
Glalie
Lv 50
Ice
Inner Focus
Light ScreenCrunchHailIce Beam
You Win
Sealeo
Lv 50
IceWater
Thick Fat
SurfBody SlamHailIce Ball
You Win
Sealeo
Lv 52
IceWater
Thick Fat
AttractDiveHailBlizzard
You Win
Glalie
Lv 52
Ice
Inner Focus
Shadow BallCrunchHailIce Beam
Even
Walrein
Lv 53
IceWater
Thick Fat
SurfBody SlamBlizzardSheer Cold
Drake
Elite Four
Good

Aggron has the type edge here and should clean up Drake's team.

You Win
Shelgon
Lv 52
Dragon
Rock Head
Rock TombDragon ClawProtectCrunch
You Win
Altaria
Lv 54
DragonFlying
Natural Cure
Take DownDragon BreathDragon DanceRefresh
You Win
Flygon
Lv 53
GroundDragon
LevitateImmune to Ground attacks
DigDragon BreathFlySandstorm
You Win
Flygon
Lv 53
GroundDragon
LevitateImmune to Ground attacks
FlamethrowerCrunchDragon BreathSand Attack
You Win
Salamence
Lv 55
DragonFlying
Intimidate
FlamethrowerDragon ClawFlyCrunch
Steven
Champion
Even

Aggron trades roughly evenly with Steven's team.

Even
Skarmory
Lv 57
SteelFlying
Keen Eye
ToxicAerial AceSpikesSteel Wing
Even
Claydol
Lv 55
GroundPsychic
LevitateImmune to Ground attacks
ReflectLight ScreenAncient PowerEarthquake
Even
Aggron
Lv 56
SteelRock
Sturdy
ThunderEarthquakeSolar BeamDragon Claw
Easy KO
Cradily
Lv 56
RockGrass
Suction Cups
Giga DrainAncient PowerSludge BombConfuse Ray
You Win
Armaldo
Lv 56
RockBug
Battle Armor
Water PulseAncient PowerAerial AceSlash
Avoid
Metagross
Lv 58
SteelPsychic
Clear Body
EarthquakePsychicMeteor MashHyper Beam

Catch Aron

Available after Badge 1
Type
SteelRock
Tier
E

Catch Aron in Granite Cave (walking, Lv 7-8, uncommon).

View Aron locations

Evolve Aron to Lairon

Level 32
Type
SteelRock
Tier
E

Aron evolves into Lairon at Level 32. Your Aron should hit Level 32 before you reach Tate & Liza, at typical leveling pace.

View Lairon locations

Recommended Moves

  • STARTING (Lv 32)
    • LV 32SteelIron TailPower 150Accuracy 75%PP 15
    • LV 32SteelMetal ClawPower 75Accuracy 95%PP 35
    • LV 32NormalTake DownPower 90Accuracy 85%PP 20
  • After Wattson
  • After Flannery
    • TM06PoisonToxicPower —Accuracy 85%PP 10Fiery Path
  • After Norman
  • After Tate & Liza
    • LV 53NormalDouble-EdgePower 120Accuracy 100%PP 15

Evolve Lairon to Aggron

Level 42
Type
SteelRock
Tier
B

Lairon evolves into Aggron at Level 42. Your Lairon should hit Level 42 before you reach Sidney, at typical leveling pace.

Recommended Moves

  • STARTING (Lv 42)
    • LV 42SteelIron TailPower 150Accuracy 75%PP 15
  • After Brawly
  • After Norman
  • After Tate & Liza
    • LV 63NormalDouble-EdgePower 120Accuracy 100%PP 15

How to Get Aggron in Ruby & Sapphire

You won't dig up a wild Aggron anywhere. It comes off a level-42 Lairon, and since both earlier stages live in caves, the entire climb to it happens underground.

Wild Aggron may be holding when caught:

Hard Stone (5% chance) A hold item that raises the power of ROCK-type moves.

Catch Aron or Lairon at any of these 2 spots to eventually evolve into Aggron.

Encountered via tall grass encounters

  1. 1
    Catch Aron
  2. 2
    Evolve Laironat Lv.32
  3. 3
    Evolve Aggronat Lv.42
Badge 2
Badge 3
Badge 4
Badge 5
Badge 6
Badge 7
Badge 8

How to Obtain Aggron in RS

To get Aggron, start by catching Aron through walking encounters at Lv. 7-36. The chain covers 2 catchable stages before reaching the final form.

  1. Aggron
    Step 3Aggron ✓
    BREEDING
    Available
    Leave a compatible parent at the Pokemon Day Care to receive a Aron egg.

How to Get Shiny Aggron in Ruby & Sapphire

Aggron comes from Lairon, so track a shiny Lairon through Victory Road and evolve it up into Aggron. Compare Shiny Aggron odds across every game

Normal vs Shiny
Normal Aggron in Ruby & SapphireNormal
Shiny Aggron in Ruby & Sapphire Shiny
Color ShiftGray
Shiny TierC Tier Shiny

Shiny Aggron Evolution

3 Forms
Showing shiny artworkView Full Evolution Chart

Ruby & Sapphire Shiny Aggron Calculator

2 Methods
Shiny Odds

Both methods here share the same odds, about 1 in 8,192 on each try. Pick whichever fits how you play.

Step 1 · Encounter Method2 in Ruby & Sapphire

Full Odds: Walk through grass, surf, or fish. Every encounter is its own independent shiny roll.

Breeding: Hatch eggs of this line; each egg rolls at the base shiny rate (no Masuda before Gen IV).

How many you have done, or plan to do.

120,000
Shiny Odds Per Try1 / 8,192Full Odds
Chance By Now50.0%at 5,678 encountersAbout 5 in 10 hunters have one by now
What To Expect
ChanceEncountersTime
10%lucky few864----
25%one in four2,357----
50%coin flip5,678----
90%very likely18,862----
How is this calculated?

Every encounter has the same shiny chance, the Shiny Odds Per Try shown above. Each one is a separate roll that does not care how many you have already done, so the more you hunt, the higher your overall chance of at least one shiny. The formula below turns your odds and your number of tries into that combined chance.

chance after N tries = 1 − (1 − p)^N,  where  p = 1 / odds per try

Example at 1 in 8,192 (classic full odds): about 864 encounters for a 10 percent chance, 5,678 for 50 percent, and 18,862 for 90 percent.

The table above flips that around: it shows how many encounters it takes to reach a 10, 25, 50, and 90 percent chance at your current odds. Turning on boosts like the Shiny Charm, sandwiches, or chains improves your odds, so the encounter numbers drop.

These are estimates, not promises. Most games have no pity counter, meaning no guaranteed shiny no matter how many you hunt, so even Very Likely is not guaranteed: some hunters find one early, others go well past that point.

Where these shiny odds come from: Read our full methodology

For time estimates and charm math, open the Ruby & Sapphire shiny odds calculator with Aggron already selected.

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
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
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

What is Aggron Weak Against

Good
3Weak
9Resist
1Immune
Score+4

What is Aggron Strong Against

5Strong
1Resisted
0Immune
Score+4
½xResisted
0xImmune
None

Best Pokemon Against Aggron

Breloom
Breloom
GrassFighting
B
Heracross
Heracross
BugFighting
A
Hariyama
Hariyama
Fighting
B
Blaziken
Blaziken
FireFighting
B
Swampert
Swampert
WaterGround
S

Aggron Evolutions

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
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
330E-Tier
430E-Tier+100
530B-Tier+100
ROLE
Balanced
Trick Room
Balanced
TYPE
Physical
Physical
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)
venusaurcharizardblastoisenidokingmeganiumferaligatrampharossceptileswampertslowbrorhydonslowking

RS Aggron Best Moveset

Steel/Rock provides nine resistances but 4x Fighting and Ground weaknesses. 110 Attack fires MoveEarthquake and Rock TermStab hard, and AbilityRock Head eliminates MoveDouble-Edge recoil. Held ItemChoice Band boosts further. Massive physical power on a typing with devastating weak points.

Best Build

Experimental
Physical Tank
Ability
Sturdy
Item
LeftoversSUSTAIN
Best Nature for Aggron

Aggron best EVs are Attack and HP

EVs

Physical Tank Moveset

  • Rock SlideSTAB
  • Focus Punch
  • Thunder Wave
  • SubstituteUtility

Moves List

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 Tomb and switchins need to think twice.

Level-Up Moves

Lv 1
Harden
C——30Normal
Lv 1
Headbutt
C7010015Normal
Lv 1
Mud-Slap
D2010010Ground
Lv 1
Tackle
D3510035Normal
Lv 4
Harden
C——30Normal
Lv 7
Mud-Slap
D2010010Ground
Lv 10
Headbutt
C7010015Normal
Lv 13
Metal Claw
—759535Steel
Lv 17
Iron Defense
———15Steel
Lv 21
Roar-6
C——20Normal
Lv 25
Take Down
C908520Normal
Lv 29
Iron Tail
B1507515Steel
Lv 37
Protect+4
C——10Normal
Lv 50
Metal Sound
——8540Steel
Lv 63
Double-Edge
B12010015Normal

TM Moves

All 37 TMs are obtainable before the Elite Four

TM
TM40C60—20Flying
TM45
AttractVerdanturf Townbadge 2
——10015Normal
TM14D120705Ice
TM31
Brick BreakSootopolis Citynot until badge 7
C7510015Fighting
HM01D509530Normal
TM28
DigRoute 114badge 3
C6010010Ground
TM32
Double TeamRoute 113badge 2
———15Normal
TM02
Dragon ClawMeteor Fallsnot until badge 8
C8010015Dragon
TM26
EarthquakeSeafloor Cavernnot until badge 7
A10010010Ground
TM42C7010020Normal
TM38
Fire BlastLilycove Department Storebadge 5
D120855Fire
TM35
FlamethrowerMauville Game Cornerbadge 2
D9510015Fire
TM01
Focus Punch-3Route 115badge 5
B15010020Fighting
TM10
Hidden PowerFortree Citybadge 3
—6010015Normal
TM15
Hyper BeamLilycove Department Storebadge 5
C150905Normal
TM13
Ice BeamAbandoned Shipbadge 2
D9510010Ice
TM23
Iron TailMeteor Fallsnot until badge 8
B1507515Steel
TM17C——10Normal
TM18
Rain DanceAbandoned Shipnot until badge 7
C——5Water
TM44
RestLilycove Citybadge 5
C——10Psychic
TM27
ReturnFallarbor Townbadge 3
D—10020Normal
TM05
Roar-6Route 114badge 3
C——20Normal
HM06
Rock SmashMauville Citybadge 2
D2010015Fighting
TM39C909510Rock
TM37
SandstormRoute 111badge 4
D——10Rock
TM43
Secret PowerRoute 111badge 3
—7010020Normal
TM34D60—20Electric
TM22
Solar BeamSafari Zonebadge 5
C12010010Grass
HM04
StrengthRusturf Tunnelbadge 3
—8010015Normal
TM11
Sunny DayScorched Slabbadge 5
C——5Fire
HM03
SurfPetalburg Citybadge 5
D9510015Water
TM25D1207010Electric
TM24
ThunderboltMauville Game Cornerbadge 2
D9510015Electric
TM06
ToxicFiery Pathbadge 4
C—8510Poison
TM03
Water PulsePrize for defeating Wallacenot until badge 8
D6010020Water

Egg Moves

Egg
Egg
Body Slam
C8510015Normal
Egg
Endeavor
D—1005Normal
Egg
Smelling Salts
C7010010Normal
Egg
Stomp
C6510020Normal

Tutor Moves

Aggron can't learn any Tutor moves

Base Stats

Base Stats
High
HP70
C
Attack110
B
Defense180
S
Sp. Atk60
C
Sp. Def60
C
Speed50
D
Total530
Details
Catch Rate
Challenging45 / 255
Growth Rate
Slow1.25M XP
Height2.1 m
Weight360.0 kg
Base XP239
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.
EV Yield
HPAtkDef+3SpASpDSpe
Strong Defense training target
Pokedex Entry

AGGRON claims an entire mountain as its own territory. It mercilessly beats up anything that violates its environment. This POKéMON vigilantly patrols its territory at all times.

AGGRON is surprisingly protective of its environment. If its mountain is ravaged by a landslide or a fire, this POKéMON will haul topsoil to the area, plant trees, and beautifully restore its own territory.

Aggron Ruby & Sapphire Guide

  • Aggron is obtained in Pokemon Ruby & Sapphire by evolving Lairon under specific conditions.

Game Availability

Aggron first appeared in Ruby & Sapphire and spans 15 games across 7 generations. It later gained a Mega form in Generation 6, adding new dimensions to its competitive identity.

Explore

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