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.
Its 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.
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.
| 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 |
- Dark and Steel types added — Fairy does not exist yet
- Moves are Physical or Special based on type, not per move
In Emerald, Aerodactyl can KO Aggron with Earthquake (102-120%). Starmie threatens a KO with Surf (112-132%).
 | A | |
Recommended Build AbilityRockhead ItemChoice Band NatureJolly Moves
Damage vs Aggron View Aerodactyl builds →Earthquake 4x102-120%KO Rock Slide14-17% Double Edge8-9% | ||
 Starmie WaterPsychic | A | |
Recommended Build AbilityNatural Cure ItemLeftovers NatureTimid Moves
Damage vs Aggron View Starmie builds →Rapid Spin1-1% Ice Beam19-22% Thunderbolt37-44% Surf 2x112-132%KO | ||
 Heracross BugFighting | B | |
Recommended Build AbilitySwarm ItemSalacberry NatureJolly Moves
Damage vs Aggron View Heracross builds →Megahorn17-20% Rock Slide7-8% | ||
Emerald 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
Breeding
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.
Emerald 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
Aggron best EVs are Attack and HP
Physical Tank Moveset
- Rock Slide
- Focus Punch
- Thunder Wave
- Substitute
Recommended Teammates
Moves
Hard to wall, honestly. Aggron threatens 11 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
TM Moves
Egg Moves
Tutor Moves
How to Get Aggron in Emerald
Aggron doesn't appear wild. Catch Aron instead, it shows up at solid rates. Evolve it at level 42 to get Aggron. The 3-stage chain is mapped in the step cards below.
How to Obtain Aggron in Emerald
The path to Aggron starts with Aron at Lv. 7-44 via walking encounters. 2 catchable stages total, with locations listed for each one below.
Step 1Catch AronGranite Cave - B1FGrass Lv.9-11 Cave40%EarlyGranite Cave - B2FGrass Lv.10-12 Cave40%EarlyGranite Cave - 1F Room 2Grass Lv.7-8 Cave10%EarlyVictory Road - 1FGrass Lv.36-40 Cave5%Late
Step 2Catch or Evolve LaironVictory Road - B1FGrass Lv.40-42 Cave25%LateVictory Road - B2FGrass Lv.40-44 Cave25%LateVictory Road - 1FGrass Lv.40 Cave10%Lateor evolve from Aron (Step 1)
Step 3Aggron ✓
Aggron Guide
In Emerald, Aggron has a 530 base stat total and ranks as C-Tier: a niche pick in Emerald's meta. It works best as a balanced. Rock Slide with Leftovers is the standard set.
Mega Evolution isn't available in Emerald, but Aggron does have a Mega form in Gen 6-7 games (X/Y, ORAS, Sun/Moon). Mega Aggron hits 630 BST.
In Emerald, 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 Emerald, 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
- Gen 1Y
Yellow - Gen 1RB
Red & Blue - Gen 2GS
Gold & Silver - Gen 2C
Crystal - Gen 3RSDebut
Ruby & Sapphire - Gen 3FRLG
FireRed & LeafGreen - Gen 3E
Emerald - Gen 4Pt
Platinum - Gen 4HGSS
HeartGold & SoulSilver - Gen 4DP
Diamond & Pearl - Gen 5BW
Black & White - Gen 5B2W2
Black 2 & White 2 - Gen 6XY
X & Y - Gen 6ORASMega
Omega Ruby & Alpha Sapphire - Gen 7USUM
Ultra Sun & Ultra Moon - Gen 7SM
Sun & Moon - Gen 7LGPE
Let's Go Pikachu & Eevee - Gen 8SwSh
Sword & Shield - Gen 8PLA
Legends: Arceus - Gen 8BDSP
Brilliant Diamond & Shining Pearl - Gen 9SV
Scarlet & Violet - Gen 9LZA
Legends: Z-A - Gen 10WW
Winds & Waves