Caillou is looking for Charred Lizard, Bat Wings, and Slime Liver. I've never seen any of these items for sale or dropped by monsters. Where do I get them?
They can all be found in the Green Way.
Kobolds (the furry brown things who throw nuts at you) and Reginald Drisby (Rat Boss) drop the Charred Lizard, The Crowned Slime drops the Slime Liver, and the Bat Wings are from the floating eye things (Eyebats).