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Counter guide · Steel / Rock · Gen III

What beats Aggron?

The 5 hardest counters to Aggron ranked by type effectiveness, base-stat total, and Speed. Keldeo outspeeds and hits for 4× with fighting-type STAB.

Aggron
No. 306
Aggron
Steel Rock
BST 530 · Speed 50 · Atk 110 · SpA 60

Top 5 counters

  1. #1
    Keldeo
    No. 647
    Keldeo
    Water Fighting
    Hits Aggron for 4× via fighting-type STAB Takes ½× back from steel-type STAB Speed: 108 > 50 (outspeeds) Lean: Special (SpA 129)
  2. #2
    Sandy Shocks
    No. 989
    Sandy Shocks
    Electric Ground
    Hits Aggron for 4× via ground-type STAB Takes ½× back from steel-type STAB Speed: 101 > 50 (outspeeds) Lean: Special (SpA 121)
  3. #3
    Iron Treads
    No. 990
    Iron Treads
    Ground Steel
    Hits Aggron for 4× via ground-type STAB Takes ½× back from steel-type STAB Speed: 106 > 50 (outspeeds) Lean: Physical (Atk 112)
  4. #4
    Excadrill
    No. 530
    Excadrill
    Ground Steel
    Hits Aggron for 4× via ground-type STAB Takes ½× back from steel-type STAB Speed: 88 > 50 (outspeeds) Lean: Physical (Atk 135)
  5. #5
    Cobalion
    No. 638
    Cobalion
    Steel Fighting
    Hits Aggron for 4× via fighting-type STAB Takes ½× back from steel-type STAB Speed: 108 > 50 (outspeeds) Lean: Physical (Atk 90)

Aggron's type weaknesses

4× weak to
Fighting Ground
2× weak to
Water
Immune to
Poison

How this list is computed

Each candidate is scored on best-STAB damage into Aggron, the damage taken back, Speed comparison, base-stat total, and offensive lean (Attack vs Sp. Attack). Candidates that Aggron hits super-effectively for 2× or more without taking comparable damage back are filtered out — they die first. Type-immune candidates are excluded entirely.

Counters are theoretical type-chart matchups, not damage calculations. Item, ability, and move-set choices can swing real battles. Use this list as a starting point, not a final answer.