I’m having a blast doing these, omfg.
Chuumon are just large naked mice, also very weak and so they prefer to hang around other, stronger mutant Digimon. They themselves aren’t the ones to hurt anyone, and they’re easily frightened and shy, but for survival…
Numemon are semi-slugs, but like, say, squids, they possess large, jagged beaks that are usually hidden in their three-jawed mouths. Don’t ask how it works, I have no idea and don’t care, but do these guys fUCKING BITE. Aside from throwing slime and poop at you, if a bunch of them’ll actually bite you - it’s gonna hurt and will probably kill you.
Gerbemon are… made of slime and shit and garbage as their names suggest, but also of what seems to be animal remains that provide a very weak carcass for their rotting slimy bodies.* Their eyeballs just float in the empty skull sockets, held in place by the slime, so they don’t really have good eyesight due to the eyes turning in random directions. They move like hermit crabs, dragging the trash cans along, and are pretty slow, but unlike most mutant Digimon, these things are strong and WILL attack you the moment they can.
All of these Digimon are usually found in sewers, on the outskirts or larger cities and in dumps.
I’ll also put this stuff under the #Blackout headcanons tag from now on
* Like those slimy things in Warcraft