dun dun DUN
>>54153160well, actually the darkness field in this game already:
>Sleep lasts for 2-4 turns on Stages 2 and above.>Dark-type and Ghost-type Pokémon take reduced damage by 0.9x [Stage 2] or 0.75x [Stage 3].>Dark-type and Ghost-type weaknesses are annulled on Stage 3.