In earlier test I did something wrong, I had the wrong enemy ID for the Mesets. I just tried their real id and they're like the Rasklapanje: they do work, but they're completely invisible. This might be just specific to Urban Chaos and the enemy types only fully work for the levels they're supposed to be in.
Now as I've identified a bunch of more enemy IDs, I updated the enemy list for the DLC stages. Bear in mind that some of this information could be wrong.
Requiem for War:
-European j'avo
-Bees
-Ogroman
Rooftop Mission:
-Zombie
-Firefighter zombie
-Zombie dog
-Whopper
-Napad
Creature Workshop:
-
j'avo
-Napad
-Chainsaw boss
Liquid Fire:
-J'avo (not sure which kind)
-Napad
-Meset
-Rasklapanje