ROM Hack Guides
Home › Pokédex › Mega Aggron
#0306 · Generation III · form of Aggron

Mega Aggron

Steel · Iron Armor Pokémon — first seen in Generation III.

Showing the official games. Pick a ROM hack to see how it changes this Pokémon, or compare all of them.

Base stats

StatBaseMinMax
HP70
250344
Attack140
256416
Defense230
418614
Sp. Attack60
112240
Sp. Defense80
148284
Speed50
94218
Total630

Min and max are at level 100: the minimum is 0 IVs, 0 EVs and a hindering nature, the maximum 31 IVs, 252 EVs and a beneficial nature. Shedinja's HP is always 1 whatever the formula says.

Type defences

Damage Mega Aggron takes from each attacking type.

×2
FightingGroundFire
×½
NormalFlyingRockBugSteelGrassPsychicIceDragonFairy
×0
Poison
×1
GhostWaterElectricDark

Evolution

AronAron#0304
Level 32LaironLairon#0305
Level 42AggronAggron#0306

Methods are the current official ones. A ROM hack may change them — trade evolutions especially; the guide table below says which do.

In the ROM hacks it evolves differently

Each guide's own line, in the words its creator published.

In Pokémon Odyssey

Lairon (Etrian)Lairon (Etrian)
Evolves into Aggron (Etrian) at Level 42AggronAggron

In Pokémon Omega Ruby Origins

SnoruntSnoruntAronAron
Evolves into Aggron (Mega) at Level 42Evolves into Aggron at Level 42AggronAggronEvolves into Lairon at Level 32LaironLairon

Other forms

AggronAggron

Moves by official game

Level-up, TM/HM, tutor and egg moves exactly as each game has them. The newest game this site covers is open; the rest fold out.

Ultra Sun / Ultra Moon20 level-up · 49 TM/HM · 24 tutor

Level-up

LvMoveTypeCat.PowerAcc.PP
1HeadbuttNormalPhysical70100%15
1TackleNormalPhysical40100%35
1HardenNormalStatus——30
1Mud-SlapGroundSpecial20100%10
4Mud-SlapGroundSpecial20100%10
7HeadbuttNormalPhysical70100%15
10Metal ClawSteelPhysical5095%35
13Rock TombRockPhysical6095%15
16ProtectNormalStatus——10
19RoarNormalStatus——20
22Iron HeadSteelPhysical80100%15
25Rock SlideRockPhysical7590%10
28Take DownNormalPhysical9085%20
31Metal SoundSteelStatus—85%40
35Iron TailSteelPhysical10075%15
39Iron DefenseSteelStatus——15
45Double-EdgeNormalPhysical120100%15
51AutotomizeSteelStatus——15
57Heavy SlamSteelPhysical—100%10
63Metal BurstSteelPhysical—100%10

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM02Dragon ClawDragonPhysical80100%15
TM05RoarNormalStatus——20
TM06ToxicPoisonStatus—90%10
TM10Hidden PowerNormalSpecial60100%15
TM100ConfideNormalStatus——20
TM11Sunny DayFireStatus——5
TM12TauntDarkStatus—100%20
TM13Ice BeamIceSpecial90100%10
TM14BlizzardIceSpecial11070%5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus——10
TM18Rain DanceWaterStatus——5
TM21FrustrationNormalPhysical—100%20
TM22Solar BeamGrassSpecial120100%10
TM23Smack DownRockPhysical50100%15
TM24ThunderboltElectricSpecial90100%15
TM25ThunderElectricSpecial11070%10
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical—100%20
TM31Brick BreakFightingPhysical75100%15
TM32Double TeamNormalStatus——15
TM35FlamethrowerFireSpecial90100%15
TM37SandstormRockStatus——10
TM38Fire BlastFireSpecial11085%5
TM39Rock TombRockPhysical6095%15
TM40Aerial AceFlyingPhysical60—20
TM42FacadeNormalPhysical70100%20
TM44RestPsychicStatus——5
TM45AttractNormalStatus—100%15
TM48RoundNormalSpecial60100%15
TM52Focus BlastFightingSpecial12070%5
TM56FlingDarkPhysical—100%10
TM59Brutal SwingDarkPhysical60100%20
TM65Shadow ClawGhostPhysical70100%15
TM66PaybackDarkPhysical50100%10
TM67Smart StrikeSteelPhysical70—10
TM68Giga ImpactNormalPhysical15090%5
TM69Rock PolishRockStatus——20
TM71Stone EdgeRockPhysical10080%5
TM73Thunder WaveElectricStatus—90%20
TM78BulldozeGroundPhysical60100%20
TM80Rock SlideRockPhysical7590%10
TM82Dragon TailDragonPhysical6090%10
TM87SwaggerNormalStatus—85%15
TM88Sleep TalkNormalStatus——10
TM90SubstituteNormalStatus——10
TM91Flash CannonSteelSpecial80100%10
TM94SurfWaterSpecial90100%15
TM97Dark PulseDarkSpecial80100%15

Move tutor

MoveTypeCat.PowerAcc.PP
Fire PunchFirePhysical75100%15
Ice PunchIcePhysical75100%15
ThunderPunchElectricPhysical75100%15
Low KickFightingPhysical—100%20
SnoreNormalSpecial50100%15
SpiteGhostStatus—100%10
Icy WindIceSpecial5595%15
OutrageDragonPhysical120100%10
Iron TailSteelPhysical10075%15
UproarNormalSpecial90100%10
Focus PunchFightingPhysical150100%20
SuperpowerFightingPhysical120100%5
EndeavorNormalPhysical—100%5
Iron DefenseSteelStatus——15
BlockNormalStatus——5
Shock WaveElectricSpecial60—20
Water PulseWaterSpecial60100%20
Magnet RiseElectricStatus——10
Aqua TailWaterPhysical9090%10
Dragon PulseDragonSpecial85100%10
Earth PowerGroundSpecial90100%10
Iron HeadSteelPhysical80100%15
Stealth RockRockStatus——20
Stomping TantrumGroundPhysical75100%10
Sun / Moon20 level-up · 49 TM/HM

Level-up

LvMoveTypeCat.PowerAcc.PP
1HeadbuttNormalPhysical70100%15
1TackleNormalPhysical40100%35
1HardenNormalStatus——30
1Mud-SlapGroundSpecial20100%10
4Mud-SlapGroundSpecial20100%10
7HeadbuttNormalPhysical70100%15
10Metal ClawSteelPhysical5095%35
13Rock TombRockPhysical6095%15
16ProtectNormalStatus——10
19RoarNormalStatus——20
22Iron HeadSteelPhysical80100%15
25Rock SlideRockPhysical7590%10
28Take DownNormalPhysical9085%20
31Metal SoundSteelStatus—85%40
35Iron TailSteelPhysical10075%15
39Iron DefenseSteelStatus——15
45Double-EdgeNormalPhysical120100%15
51AutotomizeSteelStatus——15
57Heavy SlamSteelPhysical—100%10
63Metal BurstSteelPhysical—100%10

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM02Dragon ClawDragonPhysical80100%15
TM05RoarNormalStatus——20
TM06ToxicPoisonStatus—90%10
TM10Hidden PowerNormalSpecial60100%15
TM100ConfideNormalStatus——20
TM11Sunny DayFireStatus——5
TM12TauntDarkStatus—100%20
TM13Ice BeamIceSpecial90100%10
TM14BlizzardIceSpecial11070%5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus——10
TM18Rain DanceWaterStatus——5
TM21FrustrationNormalPhysical—100%20
TM22Solar BeamGrassSpecial120100%10
TM23Smack DownRockPhysical50100%15
TM24ThunderboltElectricSpecial90100%15
TM25ThunderElectricSpecial11070%10
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical—100%20
TM31Brick BreakFightingPhysical75100%15
TM32Double TeamNormalStatus——15
TM35FlamethrowerFireSpecial90100%15
TM37SandstormRockStatus——10
TM38Fire BlastFireSpecial11085%5
TM39Rock TombRockPhysical6095%15
TM40Aerial AceFlyingPhysical60—20
TM42FacadeNormalPhysical70100%20
TM44RestPsychicStatus——5
TM45AttractNormalStatus—100%15
TM48RoundNormalSpecial60100%15
TM52Focus BlastFightingSpecial12070%5
TM56FlingDarkPhysical—100%10
TM59Brutal SwingDarkPhysical60100%20
TM65Shadow ClawGhostPhysical70100%15
TM66PaybackDarkPhysical50100%10
TM67Smart StrikeSteelPhysical70—10
TM68Giga ImpactNormalPhysical15090%5
TM69Rock PolishRockStatus——20
TM71Stone EdgeRockPhysical10080%5
TM73Thunder WaveElectricStatus—90%20
TM78BulldozeGroundPhysical60100%20
TM80Rock SlideRockPhysical7590%10
TM82Dragon TailDragonPhysical6090%10
TM87SwaggerNormalStatus—85%15
TM88Sleep TalkNormalStatus——10
TM90SubstituteNormalStatus——10
TM91Flash CannonSteelSpecial80100%10
TM94SurfWaterSpecial90100%15
TM97Dark PulseDarkSpecial80100%15
Omega Ruby / Alpha Sapphire20 level-up · 55 TM/HM · 23 tutor

Level-up

LvMoveTypeCat.PowerAcc.PP
1HeadbuttNormalPhysical70100%15
1TackleNormalPhysical40100%35
1HardenNormalStatus——30
1Mud-SlapGroundSpecial20100%10
4Mud-SlapGroundSpecial20100%10
7HeadbuttNormalPhysical70100%15
10Metal ClawSteelPhysical5095%35
13Rock TombRockPhysical6095%15
16ProtectNormalStatus——10
19RoarNormalStatus——20
22Iron HeadSteelPhysical80100%15
25Rock SlideRockPhysical7590%10
28Take DownNormalPhysical9085%20
31Metal SoundSteelStatus—85%40
35Iron TailSteelPhysical10075%15
39Iron DefenseSteelStatus——15
45Double-EdgeNormalPhysical120100%15
51AutotomizeSteelStatus——15
57Heavy SlamSteelPhysical—100%10
63Metal BurstSteelPhysical—100%10

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM01Hone ClawsDarkStatus——15
TM02Dragon ClawDragonPhysical80100%15
TM05RoarNormalStatus——20
TM06ToxicPoisonStatus—90%10
TM10Hidden PowerNormalSpecial60100%15
TM100ConfideNormalStatus——20
TM11Sunny DayFireStatus——5
TM12TauntDarkStatus—100%20
TM13Ice BeamIceSpecial90100%10
TM14BlizzardIceSpecial11070%5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus——10
TM18Rain DanceWaterStatus——5
TM21FrustrationNormalPhysical—100%20
TM22Solar BeamGrassSpecial120100%10
TM23Smack DownRockPhysical50100%15
TM24ThunderboltElectricSpecial90100%15
TM25ThunderElectricSpecial11070%10
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical—100%20
TM28DigGroundPhysical80100%10
TM31Brick BreakFightingPhysical75100%15
TM32Double TeamNormalStatus——15
TM35FlamethrowerFireSpecial90100%15
TM37SandstormRockStatus——10
TM38Fire BlastFireSpecial11085%5
TM39Rock TombRockPhysical6095%15
TM40Aerial AceFlyingPhysical60—20
TM42FacadeNormalPhysical70100%20
TM44RestPsychicStatus——5
TM45AttractNormalStatus—100%15
TM48RoundNormalSpecial60100%15
TM52Focus BlastFightingSpecial12070%5
TM56FlingDarkPhysical—100%10
TM59IncinerateFireSpecial60100%15
TM65Shadow ClawGhostPhysical70100%15
TM66PaybackDarkPhysical50100%10
TM68Giga ImpactNormalPhysical15090%5
TM69Rock PolishRockStatus——20
TM71Stone EdgeRockPhysical10080%5
TM73Thunder WaveElectricStatus—90%20
TM78BulldozeGroundPhysical60100%20
TM80Rock SlideRockPhysical7590%10
TM82Dragon TailDragonPhysical6090%10
TM87SwaggerNormalStatus—85%15
TM88Sleep TalkNormalStatus——10
TM90SubstituteNormalStatus——10
TM91Flash CannonSteelSpecial80100%10
TM94Secret PowerNormalPhysical70100%20
TM97Dark PulseDarkSpecial80100%15
TM98Power-Up PunchFightingPhysical40100%20
HM01CutNormalPhysical5095%30
HM03SurfWaterSpecial90100%15
HM04StrengthNormalPhysical80100%15
HM06Rock SmashFightingPhysical40100%15

Move tutor

MoveTypeCat.PowerAcc.PP
Fire PunchFirePhysical75100%15
Ice PunchIcePhysical75100%15
ThunderPunchElectricPhysical75100%15
Low KickFightingPhysical—100%20
SnoreNormalSpecial50100%15
SpiteGhostStatus—100%10
Icy WindIceSpecial5595%15
OutrageDragonPhysical120100%10
Iron TailSteelPhysical10075%15
UproarNormalSpecial90100%10
Focus PunchFightingPhysical150100%20
SuperpowerFightingPhysical120100%5
EndeavorNormalPhysical—100%5
Iron DefenseSteelStatus——15
BlockNormalStatus——5
Shock WaveElectricSpecial60—20
Water PulseWaterSpecial60100%20
Magnet RiseElectricStatus——10
Aqua TailWaterPhysical9090%10
Dragon PulseDragonSpecial85100%10
Earth PowerGroundSpecial90100%10
Iron HeadSteelPhysical80100%15
Stealth RockRockStatus——20
X / Y18 level-up · 54 TM/HM

Level-up

LvMoveTypeCat.PowerAcc.PP
1HeadbuttNormalPhysical70100%15
1TackleNormalPhysical40100%35
1HardenNormalStatus——30
1Mud-SlapGroundSpecial20100%10
4Mud-SlapGroundSpecial20100%10
8HeadbuttNormalPhysical70100%15
11Metal ClawSteelPhysical5095%35
15Iron DefenseSteelStatus——15
18RoarNormalStatus——20
22Take DownNormalPhysical9085%20
25Iron HeadSteelPhysical80100%15
29ProtectNormalStatus——10
34Metal SoundSteelStatus—85%40
40Iron TailSteelPhysical10075%15
48AutotomizeSteelStatus——15
57Heavy SlamSteelPhysical—100%10
65Double-EdgeNormalPhysical120100%15
74Metal BurstSteelPhysical—100%10

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM01Hone ClawsDarkStatus——15
TM02Dragon ClawDragonPhysical80100%15
TM05RoarNormalStatus——20
TM06ToxicPoisonStatus—90%10
TM10Hidden PowerNormalSpecial60100%15
TM100ConfideNormalStatus——20
TM11Sunny DayFireStatus——5
TM12TauntDarkStatus—100%20
TM13Ice BeamIceSpecial90100%10
TM14BlizzardIceSpecial11070%5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus——10
TM18Rain DanceWaterStatus——5
TM21FrustrationNormalPhysical—100%20
TM22Solar BeamGrassSpecial120100%10
TM23Smack DownRockPhysical50100%15
TM24ThunderboltElectricSpecial90100%15
TM25ThunderElectricSpecial11070%10
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical—100%20
TM28DigGroundPhysical80100%10
TM31Brick BreakFightingPhysical75100%15
TM32Double TeamNormalStatus——15
TM35FlamethrowerFireSpecial90100%15
TM37SandstormRockStatus——10
TM38Fire BlastFireSpecial11085%5
TM39Rock TombRockPhysical6095%15
TM40Aerial AceFlyingPhysical60—20
TM42FacadeNormalPhysical70100%20
TM44RestPsychicStatus——5
TM45AttractNormalStatus—100%15
TM48RoundNormalSpecial60100%15
TM52Focus BlastFightingSpecial12070%5
TM56FlingDarkPhysical—100%10
TM59IncinerateFireSpecial60100%15
TM65Shadow ClawGhostPhysical70100%15
TM66PaybackDarkPhysical50100%10
TM68Giga ImpactNormalPhysical15090%5
TM69Rock PolishRockStatus——20
TM71Stone EdgeRockPhysical10080%5
TM73Thunder WaveElectricStatus—90%20
TM78BulldozeGroundPhysical60100%20
TM80Rock SlideRockPhysical7590%10
TM82Dragon TailDragonPhysical6090%10
TM87SwaggerNormalStatus—85%15
TM88Sleep TalkNormalStatus——10
TM90SubstituteNormalStatus——10
TM91Flash CannonSteelSpecial80100%10
TM94Rock SmashFightingPhysical40100%15
TM97Dark PulseDarkSpecial80100%15
TM98Power-Up PunchFightingPhysical40100%20
HM01CutNormalPhysical5095%30
HM03SurfWaterSpecial90100%15
HM04StrengthNormalPhysical80100%15

Where to find it in the official games

Not obtainable in the wild in any of the 16 official games this site covers. In those games it has to be evolved, traded or bred — or it belongs to a game whose data is not here yet.

Where to find it in the ROM hacks

1 guide on this site put it somewhere you can catch it. Areas link to that guide's own route page, with its own rates and levels.

GuideWhere
Sword and Shield Ultimate Plus
Mega
Dynamax Adventure (Crown Tundra)Raid Den · Lv — · 3.2

Compare official Mega Aggron with the ROM hacks →

In the 16 guides that include it

Changed in 14 of 16 guides: retyped in 13, stats in 13, abilities in 10, evolution in 1.

Every ROM hack on this site that has Mega Aggron, and what it did to it. Guides that changed something are first. Click one for that version's full page — locations, moveset and TMs.

GuideTypeTotalAbilities
UnboundChangedSteelRock→Steel630 +100
+30 Attack, +50 Defense, +20 Sp. Def		Filter, Filter
+ Filter, Filter − Sturdy, Rock Head, Heavy Metal
Pokémon Too Many Types 2ChangedSteelRock→AncientSteel630 +100
+30 Attack, +50 Defense, +20 Sp. Def		—
Sword and Shield Ultimate PlusChangedSteelRock→Steel630 +100
+30 Attack, +50 Defense, +20 Sp. Def		Filter
+ Filter − Sturdy, Rock Head, Heavy Metal
Lazarus
Evolves at Aggronite		ChangedSteel630Filter
Radical RedChangedSteelRock→Steel630 +100
+30 Attack, +50 Defense, +20 Sp. Def		Filter
+ Filter − Sturdy, Rock Head, Heavy Metal
Elite ReduxChangedSteelRock→Steel630 +100
+30 Attack, +50 Defense, +20 Sp. Def		Juggernaut, Heatproof, Iron Barbs
Inclement EmeraldChangedSteelRock→Steel630 +100
+30 Attack, +50 Defense, +20 Sp. Def		Filter
+ Filter − Sturdy, Rock Head, Heavy Metal
Pokémon Emerald ImperiumChangedSteelRock→Steel630 +100
+30 Attack, +50 Defense, +20 Sp. Def		Filter
+ Filter − Sturdy, Rock Head, Heavy Metal
Pokémon: Wishes of TomorrowChangedSteelRock→Steel630 +100
+30 Attack, +50 Defense, +20 Sp. Def		Filter
+ Filter − Sturdy, Rock Head, Heavy Metal
Pokémon ExceededChangedSteelRock→Steel630 +100
+30 Attack, +50 Defense, +20 Sp. Def		Fortitude, Fortitude
Low Budget CrystalChangedSteelRock→Steel560 +30
+10 Attack, +50 Defense, -50 Sp. Atk, +20 Sp. Def		Regeneration
+ Regeneration − Sturdy, Rock Head, Heavy Metal
Pokémon Emerald SquaredChangedSteelRock→Steel700 +170
+30 HP, +70 Attack, +50 Defense, +20 Sp. Atk		Filter
+ Filter − Sturdy, Rock Head, Heavy Metal
Pokémon Omega Ruby OriginsChangedSteelRock→Ice480 -50
+10 HP, -30 Attack, -100 Defense, +20 Sp. Atk, +20 Sp. Def, +30 Speed		Inner Focus
+ Inner Focus − Sturdy, Rock Head, Heavy Metal
HeartGold GenerationsChangedSteelRock→Steel630 +100
+30 Attack, +50 Defense, +20 Sp. Def		Filter
+ Filter − Sturdy, Rock Head, Heavy Metal
Pokémon SoulgoldUnchangedSteel630Filter
Pokémon R.O.W.EUnchangedSteel630Filter

Pokédex entries

What each game says about it, in the games' own words.

RubyAGGRON 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.
SapphireAGGRON 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.
EmeraldIts iron horns grow longer a little at a time. They are used to determine the AGGRON’s age. The gouges in its armor are worn with pride as mementos from battles.
FireRed / LeafGreenIt claims a large mountain as its sole territory. It mercilessly thrashes those that violate its space.
Diamond / Pearl / Platinum / Black / White / YWhile seeking iron for food, it digs tunnels by breaking through bedrock with its steel horns.
HeartGold / SoulSilverYou can tell its age by the length of its iron horns. It claims an entire mountain as its territory.
Black 2 / White 2 / XIt claims an entire mountain as its own. The more wounds it has, the more it has battled, so don’t take it lightly.
Omega RubyAggron 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.
Alpha SapphireAggron is 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.

Names in other languages

Japaneseボスゴドラ
Japanese (Rōmaji)Bossgodora
GermanStolloss
FrenchGaleking
SpanishAggron
ItalianAggron
Korean보스로라
Chinese (Simplified)波士可多拉
Chinese (Traditional)波士可多拉

Official data here is present-day reference data from PokéAPI, not a snapshot of any one game's era — the Fairy type and hidden abilities arrived partway through the series, so a difference against an older game can belong to the series rather than to that ROM hack.