Molten Down
Fire-type is super effective against Rock-type.
15 species 5 as main 10 as innate 6 battle AI weight, −2 to 10 — 6 is the untouched default
In detail
Molten Down makes Fire-type moves super effective against Rock-types instead of resisted.
Types that carry it
15 species Fire 14 Dark 2 Flying 2 Ground 2 Rock 2 Bug 1 Poison 1
As a main ability
5 speciesSelectable — one of up to three, and only one is active.