Kenner produced and sold two vehicles that weren’t meant to be used specifically by the hero figures. Each of the two Haunted Vehicles™ seemed normal enough at first, but when any of the hero figures were near, they could become scary to haunt The Real Ghostbusters. Ahhhh!!!
Air Sickness is just an old pilot who probably lost his bomber plane. Word got back to him that The Real Ghostbusters had it. I bet Flyer Ghost made it up.
I’ve taken the original 4 page Air Sickness Instructions, scanned them, and made them into 3 PNG files. Air Sickness doesn’t have decals to apply.