Rescue all five to complete The Lost Fleas and help out Fleamaster Mooshka.
Finding all five fleas for Fleamaster Mooshka in Hollow Knight: Silksong is a little similar to tracking down the caterpillar grubs in the original game. The main difference is that instead of finding hundreds of them, for now, at least, you’ll only have to locate five across the lower regions of Pharloom.
You can undertake The Lost Fleas quest from Fleamaster Mooshka in The Marrow, shortly after you leave Bone Bottom. All five fleas are located in areas before Greymoor and the higher areas of Pharloom, so here I’ll run through all of their locations and what you’ll get once you return them safely to the flea caravan.
The first flea is located in The Marrow shortly after you defeat the Bell Beast.
This one is nice and easy to find. In the Deep Docks Bellway, smash the left-hand wall (just to the left of where the Bell Beast stands—you might have to jump a bit).
