since fog gives 20% loss of accuracy to moves already, would extra cover give them 40% base evasion kind of? it would be a little to uber if you ask me. but flying boost might work, only 1.5%, aka 50% boost, because thats the boost rain gives water, and sandstorm gives rock/ground/steel etc. do you guys think that there should be a new pokemon that induces fog? like a tortoise or something? like hippowdon, but a tortoise then has like 4 holes around its shell that make fog.
also, i know everyone here knows this, but if you want to test a fog team in dpp route 10 north has instant fog, and all pokemon are around lv. 30 i think, maybe lower maybe a little higher.