Arby's Mountain Dew Menus, Arby's menusNovember 30, 2015Try the Mountain Dew or any of Arby's other delicious recipes at your neighborhood. Wash down your meal with pure energy. The KFC Exclusive Mountain Dew Flavor You Need To Know About Blog, KFCJuly 05, 2023Mountain Dew and KFC teamed up a few years ago to release a unique flavor called "Sweet Lightning".