Heavy Metal
Doubles weight; halves Ghost and Dark damage.
9 species 5 as main 4 as innate -1 battle AI weight, −2 to 10 Ignored by Mold Breaker
In detail
Doubles the Pokemon's weight.
Types that carry it
9 species Steel 9 Dragon 2 Fire 2 Ground 1 Poison 1
As a main ability
5 speciesSelectable — one of up to three, and only one is active.
As an innate
4 speciesAlways on, alongside whichever main ability is chosen.