---
title: "Aggron (#0306): Stats, Weaknesses, Moves & Lore | pokee.si"
url: "https://pokee.si/pokemon/aggron"
description: "Aggron (#0306): Steel/Rock-type Iron Armor Pokémon from Hoenn. Base stat total 530. Stats, matchups, evolutions, moves, every Pokédex entry and lore on pokee.si."
last_updated: "2026-10-21"
publisher: "pokee.si: a Pokédex for families (unofficial fan site)"
last_checked: "2026-10-20"
---

#0306 · Hoenn · Generation 3

# Aggron

Iron Armor Pokémon · Steel/Rock-type

![Aggron official artwork](https://pokee.si/img/art/306.webp)

Aggron is a [Steel](https://pokee.si/types/steel)/[Rock](https://pokee.si/types/rock)-type Pokémon, the Iron Armor Pokémon, number 306 (#0306) in the National Pokédex. It was introduced in Generation 3 and comes from the [Hoenn](https://pokee.si/guide/regions/hoenn) region. It is 2.1 m tall and weighs 360 kg.

Aggron is the Iron Armor Pokémon, a mountain-sized bully with a gentle streak: it claims a whole mountain as its territory and thrashes trespassers, yet after a landslide or fire the Pokédex says it hauls in topsoil and replants the trees. In its Mega form the iron inside it becomes steel armour covering its whole body.

## How to pronounce Aggron

Aggron is pronounced **AG-ron**. The capital letters show the stressed syllable.

Listen to Aggron said out loud:

[Listen](https://pokee.si/audio/names/306.mp3)

In Japanese it is ボスゴドラ (Bossgodora).

Hear every other name on the [Pokémon pronunciation guide](https://pokee.si/pronounce).

## Lore

### Biology

Aggron is 2.1 m tall and 360 kg, a huge biped with a grey exoskeleton under silver armour plates. Horns poke out of holes in its head armour, and wide blunt spikes sit on its shoulders. Its horns grow a little longer over time, so the Pokédex says they show its age.

### Behaviour

Aggron treats its mountain as a kingdom. The Pokédex says it patrols constantly and thrashes anything that breaks into its territory. It wears the gouges in its armour as mementos of past fights, so a heavily scarred Aggron is a veteran to be treated with respect.

### Habitat

The Pokédex gives mountains, and says it claims a whole mountain as its own. It is not in Scarlet and Violet. In Legends: Z-A it lives in Wild Zone 20 in Centrico Plaza and in the Mega Dimension DLC's Hyperspace Lumiose.

### Diet

It digs tunnels through bedrock with its horns in search of iron to eat.

### Powers

Aggron has Sturdy or Rock Head, with Heavy Metal hidden. Heavy Slam, Iron Head and Rock Slide are its main attacks, and Iron Defense makes it harder to break. Mega Aggron, using Aggronite, drops its Rock typing and gains Filter, which cuts damage from super effective moves by a quarter; its horns are said to destroy steel tanks. Base Defense 180 and Attack 110 make it a bulky bruiser.

### Name origin

Aggron may combine 'aggressive' or 'aggregate' with 'iron'. The Japanese name is Bossgodora (ボスゴドラ), which may blend 'boss', kōdō ('mining tunnel') and Kodora, the name of Lairon.

### Design inspiration

Bulbapedia suggests Aggron may draw on the Pulgasari (also spelled Bulgasari), a Korean legend about an iron-eating monster, as well as Triceratops, theropod dinosaurs and perhaps the kaiju film genre. Its head resembles a knight's or gladiator's helmet, and Mega Aggron's head plate looks like Lairon's in reverse. These are fan readings.

### Evolution notes

Aggron evolves from Lairon at level 42 and ends the line.

### In the games

Champion Steven Stone keeps an Aggron on his team of six in Ruby and Sapphire, the games where it first appeared, as he does again in Omega Ruby and Alpha Sapphire. Mega Aggron arrived in Generation VI, and in Mystery Dungeon: Explorers of Sky an Aggron guards Boulder Quarry as its boss.

### In the anime

Aggron debuted in 'A Hole Lotta Trouble' as Steven Stone's Pokémon, and in 'Battling as Hard as Stone!' it beat Ash's Dracovish before Gengar defeated it. Paul's Aggron fought Ash's Pikachu in 'Familiarity Breeds Strategy!' until Infernape's Mach Punch ended the battle.

### Fun facts

- Mega Aggron's base Defense of 230 ties Mega Steelix among Steel types and Shuckle among obtainable Pokémon, and Bulbapedia says its 150-point gap between Defense and Special Defense (80) is the largest of any Pokémon.
- Bulbapedia notes that only two dual types lose a type on Mega Evolving: Aggron and Garchomp, the latter in its Mega Garchomp Z form.
- In Ken Sugimori's original Ruby and Sapphire artwork its back plate was black instead of white, which was later corrected.
- In Generation III, Aggron is both the tallest and the heaviest Rock type.

Sources: [Bulbapedia: Aggron (Pokémon)](https://bulbapedia.bulbagarden.net/wiki/Aggron_(Pok%C3%A9mon)) · [Serebii: Aggron (Scarlet/Violet Pokédex)](https://www.serebii.net/pokedex-sv/aggron/) · [Bulbapedia: Steven Stone](https://bulbapedia.bulbagarden.net/wiki/Steven_Stone) · [Bulbapedia: Aggronite](https://bulbapedia.bulbagarden.net/wiki/Aggronite)

## Base stats

- HP: **70**
- Attack: **110**
- Defense: **180**
- Sp. Atk: **60**
- Sp. Def: **60**
- Speed: **50**

Aggron’s base stat total is **530**. Its highest stat is Defense.

## Type matchups

### What is Aggron weak to?

Aggron takes extra damage from [Fighting](https://pokee.si/types/fighting) (4×), [Ground](https://pokee.si/types/ground) (4×), [Water](https://pokee.si/types/water) (2×) moves.

It resists [Normal](https://pokee.si/types/normal) (¼×), [Flying](https://pokee.si/types/flying) (¼×), [Ice](https://pokee.si/types/ice) (½×), [Psychic](https://pokee.si/types/psychic) (½×), [Bug](https://pokee.si/types/bug) (½×), [Rock](https://pokee.si/types/rock) (½×), [Dragon](https://pokee.si/types/dragon) (½×), [Fairy](https://pokee.si/types/fairy) (½×).

It is immune to [Poison](https://pokee.si/types/poison) moves.

## Evolution

### What does Aggron evolve from?

Aggron evolves from [Lairon](https://pokee.si/pokemon/lairon) at level 42.

Aggron is the final stage of its evolution family.

The whole family: [Aron](https://pokee.si/pokemon/aron), [Lairon](https://pokee.si/pokemon/lairon), **Aggron**.

- [Aron](https://pokee.si/pokemon/aron) evolves into [Lairon](https://pokee.si/pokemon/lairon) at level 32.

## Forms

- **Mega Aggron** (Mega): [Steel](https://pokee.si/types/steel)-type, base stat total 630 (HP 70, Attack 140, Defense 230, Sp. Atk 60, Sp. Def 80, Speed 50). Ability: [Filter](https://pokee.si/abilities/filter).

## Abilities

- [Sturdy](https://pokee.si/abilities/sturdy): Prevents being KOed from full HP, leaving 1 HP instead. Protects against the one-hit KO moves regardless of HP.
- [Rock Head](https://pokee.si/abilities/rock-head): Protects against recoil damage.
- [Heavy Metal](https://pokee.si/abilities/heavy-metal) (hidden ability): Doubles the Pokémon's weight.

## Moves

### Moves Aggron learns by level up in Sword / Shield

| Level | Move | Type | Category | Power |
| --- | --- | --- | --- | --- |
| 1 | [Tackle](https://pokee.si/moves/tackle) | Normal | Physical | 40 |
| 1 | [Harden](https://pokee.si/moves/harden) | Normal | Status | — |
| 1 | [Metal Claw](https://pokee.si/moves/metal-claw) | Steel | Physical | 50 |
| 1 | [Rock Tomb](https://pokee.si/moves/rock-tomb) | Rock | Physical | 60 |
| 12 | [Roar](https://pokee.si/moves/roar) | Normal | Status | — |
| 16 | [Headbutt](https://pokee.si/moves/headbutt) | Normal | Physical | 70 |
| 20 | [Protect](https://pokee.si/moves/protect) | Normal | Status | — |
| 24 | [Rock Slide](https://pokee.si/moves/rock-slide) | Rock | Physical | 75 |
| 28 | [Iron Head](https://pokee.si/moves/iron-head) | Steel | Physical | 80 |
| 35 | [Metal Sound](https://pokee.si/moves/metal-sound) | Steel | Status | — |
| 40 | [Take Down](https://pokee.si/moves/take-down) | Normal | Physical | 90 |
| 48 | [Autotomize](https://pokee.si/moves/autotomize) | Steel | Status | — |
| 56 | [Iron Tail](https://pokee.si/moves/iron-tail) | Steel | Physical | 100 |
| 64 | [Iron Defense](https://pokee.si/moves/iron-defense) | Steel | Status | — |
| 72 | [Heavy Slam](https://pokee.si/moves/heavy-slam) | Steel | Physical | — |
| 80 | [Double-Edge](https://pokee.si/moves/double-edge) | Normal | Physical | 120 |
| 88 | [Metal Burst](https://pokee.si/moves/metal-burst) | Steel | Physical | — |

### TM moves (70)

Aggron can learn 70 moves from TMs in Sword / Shield: [Mega Punch](https://pokee.si/moves/mega-punch), [Mega Kick](https://pokee.si/moves/mega-kick), [Fire Punch](https://pokee.si/moves/fire-punch), [Ice Punch](https://pokee.si/moves/ice-punch), [Thunder Punch](https://pokee.si/moves/thunder-punch), [Hyper Beam](https://pokee.si/moves/hyper-beam), [Giga Impact](https://pokee.si/moves/giga-impact), [Solar Beam](https://pokee.si/moves/solar-beam), [Thunder Wave](https://pokee.si/moves/thunder-wave), [Dig](https://pokee.si/moves/dig), [Screech](https://pokee.si/moves/screech), [Rest](https://pokee.si/moves/rest), [Rock Slide](https://pokee.si/moves/rock-slide), [Snore](https://pokee.si/moves/snore), [Protect](https://pokee.si/moves/protect), [Scary Face](https://pokee.si/moves/scary-face), [Icy Wind](https://pokee.si/moves/icy-wind), [Attract](https://pokee.si/moves/attract), [Sandstorm](https://pokee.si/moves/sandstorm), [Rain Dance](https://pokee.si/moves/rain-dance), [Sunny Day](https://pokee.si/moves/sunny-day), [Whirlpool](https://pokee.si/moves/whirlpool), [Facade](https://pokee.si/moves/facade), [Brick Break](https://pokee.si/moves/brick-break), [Rock Tomb](https://pokee.si/moves/rock-tomb), [Sand Tomb](https://pokee.si/moves/sand-tomb), [Rock Blast](https://pokee.si/moves/rock-blast), [Payback](https://pokee.si/moves/payback), [Fling](https://pokee.si/moves/fling), [Avalanche](https://pokee.si/moves/avalanche), [Shadow Claw](https://pokee.si/moves/shadow-claw), [Round](https://pokee.si/moves/round), [Bulldoze](https://pokee.si/moves/bulldoze), [Smart Strike](https://pokee.si/moves/smart-strike), [Brutal Swing](https://pokee.si/moves/brutal-swing), [Stomping Tantrum](https://pokee.si/moves/stomping-tantrum), [Body Slam](https://pokee.si/moves/body-slam), [Flamethrower](https://pokee.si/moves/flamethrower), [Hydro Pump](https://pokee.si/moves/hydro-pump), [Surf](https://pokee.si/moves/surf), [Ice Beam](https://pokee.si/moves/ice-beam), [Blizzard](https://pokee.si/moves/blizzard), [Low Kick](https://pokee.si/moves/low-kick), [Thunderbolt](https://pokee.si/moves/thunderbolt), [Thunder](https://pokee.si/moves/thunder), [Earthquake](https://pokee.si/moves/earthquake), [Fire Blast](https://pokee.si/moves/fire-blast), [Substitute](https://pokee.si/moves/substitute), [Reversal](https://pokee.si/moves/reversal), [Outrage](https://pokee.si/moves/outrage), [Endure](https://pokee.si/moves/endure), [Sleep Talk](https://pokee.si/moves/sleep-talk), [Iron Tail](https://pokee.si/moves/iron-tail), [Crunch](https://pokee.si/moves/crunch), [Uproar](https://pokee.si/moves/uproar), [Taunt](https://pokee.si/moves/taunt), [Superpower](https://pokee.si/moves/superpower), [Iron Defense](https://pokee.si/moves/iron-defense), [Dragon Claw](https://pokee.si/moves/dragon-claw), [Dark Pulse](https://pokee.si/moves/dark-pulse), [Dragon Pulse](https://pokee.si/moves/dragon-pulse), [Focus Blast](https://pokee.si/moves/focus-blast), [Earth Power](https://pokee.si/moves/earth-power), [Flash Cannon](https://pokee.si/moves/flash-cannon), [Iron Head](https://pokee.si/moves/iron-head), [Stone Edge](https://pokee.si/moves/stone-edge), [Stealth Rock](https://pokee.si/moves/stealth-rock), [Heavy Slam](https://pokee.si/moves/heavy-slam), [High Horsepower](https://pokee.si/moves/high-horsepower), [Body Press](https://pokee.si/moves/body-press).

Egg moves (6), which Aron can hatch knowing:[Curse](https://pokee.si/moves/curse), [Dragon Rush](https://pokee.si/moves/dragon-rush), [Endeavor](https://pokee.si/moves/endeavor), [Head Smash](https://pokee.si/moves/head-smash), [Mud-Slap](https://pokee.si/moves/mud-slap), [Stomp](https://pokee.si/moves/stomp).

Move tutor moves (3): [Meteor Beam](https://pokee.si/moves/meteor-beam), [Steel Beam](https://pokee.si/moves/steel-beam), [Steel Roller](https://pokee.si/moves/steel-roller).

## Breeding & training

- Gender: 50% male, 50% female.
- Egg groups: Monster.
- Egg cycles: 35 (steps to hatch, Scarlet/Violet: 4,480).
- Catch rate: 45 out of 255.
- Base friendship (Gen 8 onward): 35.
- Growth rate: Slow (1,250,000 experience points to reach level 100).
- Defeating it gives 3 Defense effort values.
- Base experience yield: 239.

## Pokédex entries

Long ago, there was a king who wore a helmet meant to resemble the head of an Aggron. He was trying to channel the Pokémon's strength. *(Shield)*

Aggron has a horn sharp enough to perforate thick iron sheets. It brings down its opponents by ramming into them horn first. *(Sword)*

Aggron 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. *(Alpha Sapphire)*

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. *(Ruby, Omega Ruby)*

While seeking iron for food, it digs tunnels by breaking through bedrock with its steel horns. *(Diamond, Pearl, Platinum, Black, White, Y)*

It claims an entire mountain as its own. The more wounds it has, the more it has battled, so don't take it lightly. *(Black 2, White 2, X)*

## Names around the world

- **Japanese**: ボスゴドラ
- **Romaji**: Bossgodora
- **French**: Galeking
- **German**: Stolloss
- **Spanish**: Aggron
- **Italian**: Aggron
- **Korean**: 보스로라
- **Chinese (Simplified)**: 波士可多拉
- **Chinese (Traditional)**: 波士可多拉

## Trivia

- Heaviest Rock type in Gen 3: 360 kg.
- Tallest Rock type in Gen 3: 2.1 m.
- Tallest Steel type in Gen 3: 2.1 m.
- Highest Defense among Steel types in Gen 3: 180.
- Taller than 90% of all Pokémon (2.1 m).
- Heavier than 97% of all Pokémon (360 kg).
- Base stat total 530, ranked #163 of 1,025.
- Its best stat is Defense, ranked #6 of 1,025.
- One of 7 Pokémon that are both Steel and Rock.
- One of 107 gray Pokémon.
- Number 55 of 135 Pokémon introduced in Generation 3 (Hoenn).
- Part of an evolution family of 3 Pokémon.
- Can learn 89 different moves in Sword / Shield.
- Catch rate 45: about 5.9% per Poké Ball at full health.
- Has 1 alternate form.
- Appears in 10 distinct Pokédex entries.

## Sources and fact-checking

- Stats, types, abilities, moves, evolutions, forms and Pokédex entries: [PokéAPI](https://pokeapi.co) open game data.
- Lore: written by pokee.si in our own words, researched from [Bulbapedia: Aggron (Pokémon)](https://bulbapedia.bulbagarden.net/wiki/Aggron_(Pok%C3%A9mon)), [Serebii: Aggron (Scarlet/Violet Pokédex)](https://www.serebii.net/pokedex-sv/aggron/), [Bulbapedia: Steven Stone](https://bulbapedia.bulbagarden.net/wiki/Steven_Stone), [Bulbapedia: Aggronite](https://bulbapedia.bulbagarden.net/wiki/Aggronite).
- Pronunciation (AG-ron): it follows how the English anime, games or official videos say it.

**Last checked:** 20 October 2026. Every sentence of the lore was checked against Bulbapedia, Serebii and the game data.

## Explore

[Steel-type Pokémon](https://pokee.si/types/steel) · [Rock-type Pokémon](https://pokee.si/types/rock) · [Steel/Rock weaknesses and matchups](https://pokee.si/types/rock-steel) · [Hoenn region guide](https://pokee.si/guide/regions/hoenn) · [Sturdy ability](https://pokee.si/abilities/sturdy) · [Rock Head ability](https://pokee.si/abilities/rock-head) · [Heavy Metal ability](https://pokee.si/abilities/heavy-metal) · [Compare Aggron](https://pokee.si/compare?ids=306) · [Full Pokédex](https://pokee.si/pokedex) · [Type chart](https://pokee.si/types) · [All moves](https://pokee.si/moves)

## Browse similar Pokémon

[Gen 3 Steel-type Pokémon](https://pokee.si/types/steel/gen-3) · [Gen 3 Rock-type Pokémon](https://pokee.si/types/rock/gen-3) · [Gen 3 Pokémon list](https://pokee.si/pokedex/gen-3) · [Gray Pokémon list](https://pokee.si/colours/gray) · [Monster egg group](https://pokee.si/egg-groups/monster) · [Pokémon that start with A](https://pokee.si/pokemon-names/a) · [Dinosaur Pokémon](https://pokee.si/animals/dinosaur)

← [Lairon](https://pokee.si/pokemon/lairon) | [Meditite](https://pokee.si/pokemon/meditite) →

---

Source: https://pokee.si/pokemon/aggron (HTML page). pokee.si is an unofficial fan site and is not affiliated with Nintendo, Creatures, GAME FREAK or The Pokémon Company. Pokémon and all related names and images are © their respective owners.