5 Things Only Marvel Fans Know About Logan's Super Sniff Power

Wolverine's super-sniffing also comes in handy against one hero who doesn't have any scent whatsoever: Fantomex.

Fantomex is one of the more mysterious Marvel mutants, gaining powers from the Weapon Plus program as Weapon XIII. Being part of the project gave him a secondary nervous system called E.V.A., allowing him a host of other powers and skills, including having multiple brains, the ability to create illusions, super-intelligence, and nano-active blood. As a result of his physical transformation, he also doesn't emit any scent, making him difficult to track by even the greatest hunters, Wolverine included.

However, in "Uncanny X-Men" #520 (by Matt Fraction, Greg Land, Jay Leisten, Justin Ponsor, and Joe Caramagna), the X-Men head to the sewers in search of Fantomex to help fight against a swarm of microscopic nano-bots. Despite Fantomex not wanting to be found, Wolverine reveals he located his fellow mutant in the smelly underground location by finding one area that isn't like the others. In Wolverine's words, "That's just it — there's a ... you-shaped hole in the smell of this dump. Perfect little bit o'nothing in the middle of a damn sewer." 

So, every hero and villain, even ones with no scent at all, should be worried about getting tracked down by Wolverine. As shown when he spots Fantomex, sometimes it's what Wolverine doesn't smell that's just as important.