Quoted By:
Air/Wind type.
>attacking
Ground, Water, Fire, Grass x2
Rock, Steel x0.5
Flying x0
>defending
Flying, Ghost x2
Grass, Water, Fire x0.5
Ground, Electric x0
Obviously it overlaps a lot with flying in concept, but it could differentiate some shit instead of slapping flying on everything wind related.
Tornadus and genies, Castform, Minior, Fan Rotom would get it for sure.
Drifloon line, Hoppip line.
Basically shit that flies without wings would get it.
Koffing could get it, or not.
Could retcon some of those normal/flying in wind/flying to add flavour to them bit without real justification.