Aggron's Steel/Rock typing gives it an immunity to Poison. Only 3 weaknesses on top of that — it has plenty of safe switch-in opportunities. A competitive option since Gen 3. It relies on priority moves or Scarf to keep up.
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.
You can tell its age by the length of its iron horns. It claims an entire mountain as its territory.
Aggron Weakness
GoodType-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.
- Fairy type does not exist — Dragon has fewer checks
- Physical / Special split now per-move (introduced Gen IV)
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.
How to Evolve
Breed with Aggron to get Aron eggs using 63 partners from the Monster egg group. Notable egg moves include Body Slam, Curse, Dragon Rush and 6 more.
Nothing fancy here. Aggron builds around Life Orb for extra damage on every hit for a health trade, Adamant nature for the right stat lean, and max Attack and Speed EVs. Rockhead does its job quietly.
Best Build
Best Aggron Moveset
- Head Smash
- Earthquake
- Iron Head
- Rock Polish
Recommended Teammates
Hard to wall, honestly. Aggron threatens 13 types beyond its own STAB, with Normal and Ground standing out. Pair that with Head Smash and Iron Tail and switchins need to think twice.
Level-Up Moves
TM Moves
Egg Moves
Tutor Moves
Transfer Moves
No wild encounters for Aggron in HeartGold & SoulSilver. Bring Aron over from Ruby, Emerald, or Brilliant Diamond, then level through the stages. Each step in the chain is laid out below.
How to Obtain Aggron in HeartGold & SoulSilver
Aggron has a 530 base stat total and ranks as C-Tier — a situational pick that fills a niche. It works best as a balanced. Base 180 Defense is where it shines.
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.
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 appears in 15 games, including Ruby & Sapphire, FireRed & LeafGreen, and Emerald.
Aggron first appeared in Ruby & Sapphire and has been available in 15 games across 7 generations. Obtainable through wild encounters in most titles where it appears.
- Gen IY
Yellow - Gen IRB
Red & Blue - Gen IIGS
Gold & Silver - Gen IIC
Crystal - Gen IIIRSDebut
Ruby & Sapphire - Gen IIIFRLG
FireRed & LeafGreen - Gen IIIE
Emerald - Gen IVPt
Platinum - Gen IVHGSS
HeartGold & SoulSilver - Gen IVDP
Diamond & Pearl - Gen VBW
Black & White - Gen VB2W2
Black 2 & White 2 - Gen VIXY
X & Y - Gen VIORAS
Omega Ruby & Alpha Sapphire - Gen VIIUSUM
Ultra Sun & Ultra Moon - Gen VIISM
Sun & Moon - Gen VIILGPE
Let's Go Pikachu & Eevee - Gen VIIISwSh
Sword & Shield - Gen VIIIPLA
Legends: Arceus - Gen VIIIBDSP
Brilliant Diamond & Shining Pearl - Gen IXSV
Scarlet & Violet - Gen IXLZA
Legends: Z-A