Bad Luck
Foes can't crit; their rolls are min. Accuracy -5%; effects 0%.
10 species 5 as main 5 as innate 6 battle AI weight, −2 to 10 — 6 is the untouched default Ignored by Mold Breaker
In detail
Foes can not land critical hits, always roll minimum damage (85% instead of 85-100%), fail to inflict secondary effects that are not guaranteed, and have a 5% chance to miss a move.
Types that carry it
10 species Dark 7 Flying 3 Fire 2 Ghost 2 Ground 1 Ice 1
As a main ability
5 speciesSelectable — one of up to three, and only one is active.
As an innate
5 speciesAlways on, alongside whichever main ability is chosen.