Ability₉₅-Heavy Metal

• Ability₁₂₄-Light Metal
• Ability₉₅-Heavy Metal
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Doubles the weight of the Pokémon with this Ability.
⚠️Autotomize is applied before other weight-modifying effects, including Heavy Metal.
⚠️Heavy Metal is the only effect that can cause a Pokémon's weight to exceed 999.9 kg.
⚠️This has no effect on the Heavy Ball, which uses the Pokémon's species' weight rather than its current weight.
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⏲Weight Mechanics⏲
The moves Low Kick👣 and Grass Knot🌱 have a base power of 20, increasing in power based on the target's weight, at specific increments.
Metric U.S. Power
0.1 - 9.9 kg 0.1 - 21.8 lbs. 20
10.0 - 24.9 kg 21.9 - 55.0 lbs. 40
25.0 - 49.9 kg 55.1 - 110.0 lbs. 60
50.0 - 99.9 kg 110.2 - 220.2 lbs. 80
100.0 - 199.9 kg 220.4 - 440.7 lbs. 100
200.0 kg or more 440.9 lbs. or more 120
The power of the moves Heat Crash🔥 and Heavy Slam🔩 depends on the weight of both the user and the target; the lighter the target is in comparison to the user, the greater the power:
Target's Weight Power
⁺50% 40
33.35% - 50% 60
25.01% - 33.34% 80
20.01% - 25% 100
20% or less 120
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🔵Gen⁵⁺ There are several effects that can modify a Pokémon's weight in battle. They are applied in the order they are listed below:
⏲A Pokémon that uses Autotomize has its base weight decreased by 100 kg (220 lbs.) each time it uses the move and successfully changes its Speed.
⏲A Pokémon with the Ability Heavy Metal or Light Metal functions as twice or half its previously determined weight, respectively.
⏲A Pokémon holding a Float Stone functions as half its previously determined weight.
⚠️A Pokémon's weight cannot drop below 0.1 kg. Weight is stored with a granularity of 0.1 kg; if an effect halves a Pokémon's weight, the result is rounded down to the next-lower multiple of 0.1 (but cannot drop below the minimum 0.1 kg).
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🟣Gen⁶⁺ If a Pokémon changes form, any previously accumulated weight modifications due to Autotomize are lost.
~Bulbapedia
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Damage To Malamar in example:
With Heavy Metal: 162ₕₚ➡️92ₕₚ
Without Heavy Metal: 162ₕₚ➡️97ₕₚ
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Damage To Copperajah in Grass Knot example:
With Heavy Metal: 229ₕₚ➡️203ₕₚ
Without Heavy Metal: 229ₕₚ➡️206ₕₚ