Dezzy's Closet
Savvy's Attic
Scarlet's Game Room
I know of 2 creatures that drop Smoke Screen. There could be more, I don't have the scoop on ALL the bosses out there yet. I been trying to get Alex to do my work for me - uh, I mean HELP me, but I haven't had much luck yet.
Name
Location
Doctor Jackall
Royal Airship, Marleybone
Noxious Gas Golem
Main Hall, Marleybone