Nose Canon

This is my take on how irkens smell. Obviously they DO have olfactory senses, since Zim is constantly calling people smelly, and has covered his 'nose' before--in fact it seems like irkens have more sensitive noses than humans.

I imagine that irken noses are more like a combination of sensory pits and very subtle nostril slits, and are only visible if they make it really obvious. As Sadi demonstrates here. .D.

Sadi and self (c)