Aurora Borealis
Ice moves gain STAB and act as if in snow.
6 species 3 as main 3 as innate 6 battle AI weight, −2 to 10 — 6 is the untouched default
In detail
Grants STAB to Ice-type moves. Weather Ball becomes Ice-type and doubles in power, and Blizzard never misses.
Types that carry it
6 species Ice 3 Ghost 2 Water 2 Flying 1 Psychic 1 Rock 1
As a main ability
3 speciesSelectable — one of up to three, and only one is active.
As an innate
3 speciesAlways on, alongside whichever main ability is chosen.