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Counter guide · Grass · Gen II

What beats Meganium?

The 5 hardest counters to Meganium ranked by type effectiveness, base-stat total, and Speed. Eternatus outspeeds and hits for 2× with poison-type STAB.

Meganium
No. 154
Meganium
Grass
BST 525 · Speed 80 · Atk 82 · SpA 83

Top 5 counters

  1. #1
    Eternatus
    No. 890
    Eternatus
    Poison Dragon
    Hits Meganium for 2× via poison-type STAB Takes ¼× back from grass-type STAB Speed: 130 > 80 (outspeeds) Lean: Special (SpA 145)
  2. #2
    Rayquaza
    No. 384
    Rayquaza
    Dragon Flying
    Hits Meganium for 2× via flying-type STAB Takes ¼× back from grass-type STAB Speed: 95 > 80 (outspeeds) Lean: Physical (Atk 150)
  3. #3
    Reshiram
    No. 643
    Reshiram
    Dragon Fire
    Hits Meganium for 2× via fire-type STAB Takes ¼× back from grass-type STAB Speed: 90 > 80 (outspeeds) Lean: Special (SpA 150)
  4. #4
    Ho-Oh
    No. 250
    Ho-Oh
    Fire Flying
    Hits Meganium for 2× via fire-type STAB Takes ¼× back from grass-type STAB Speed: 90 > 80 (outspeeds) Lean: Physical (Atk 130)
  5. #5
    Salamence
    No. 373
    Salamence
    Dragon Flying
    Hits Meganium for 2× via flying-type STAB Takes ¼× back from grass-type STAB Speed: 100 > 80 (outspeeds) Lean: Physical (Atk 135)

Meganium's type weaknesses

2× weak to
Fire Ice Poison Flying Bug

How this list is computed

Each candidate is scored on best-STAB damage into Meganium, the damage taken back, Speed comparison, base-stat total, and offensive lean (Attack vs Sp. Attack). Candidates that Meganium 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.