Superhuman Senses (smell) – The person has enhanced smell.
Superman doesn’t seem to use his sense of smell very much. Superman does use his dog Krypto to track down Poison Ivy in Batman V1 #612.
Daredevil uses smell a lot more than Superman since he is blind. Wolverine uses his sense of smell to track enemies and sniff out shape shifters.
Dragon Man (Marvel) is used to hunt Spider-Man using his scent by the Wizard in Web of Spider-Man V1 #61.
Fin Fang Foom (Marvel) finds a baby dragon using scent in Drax V2 #11.
Lobo (DC) can apparently smell crazy in Annual Injustice – Gods among Us #1.