Hollow Knight Silksong Lost Fleas Wish: All Locations and Rewards Guide

Hollow Knight Silksong is full of side quests that reward exploration, and one of the earliest is the Lost Fleas wish. This quest begins after Hornet meets Fleamaster Mooshka in The Marrow. Mooshka asks you to rescue missing critters scattered across Pharloom.

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Although there are 30 fleas in total, you only need to return five to complete the quest. Doing so unlocks a valuable reward and expands your access to new areas of the map.

This guide will help you locate all Hollow Knight Silksong Lost Fleas and explain the rewards you’ll receive for completing the quest.

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All Hollow Knight Silksong Lost Fleas Locations

Here are the five flea locations required to finish the quest:

1) The Marrow

• The first flea can be found in a chamber above the Bell Beast.
• Defeat the creature, head east toward the bench room, and climb the platforms.
• Use collapsing platforms to reach the upper-right corner where the flea awaits.

2) Deep Docks (First Flea)

• Unlock the Swift Step ability from a nearby shrine to access this flea.
• Dash across to the west platforms.
• You’ll find the flea in the top-left section of the chamber.

3) Deep Docks (Second Flea)

• From the fast travel point, break through a destructible wall beside the Bell Beast.
• Inside, navigate a room filled with falling lava.
• Climb to the top platform to reach the hidden flea.

4) Far Field

• Teleport to the lower chamber and head left across the top platforms.
• When you hit the wall, climb into the upper corridor and move right.
• Break the fake wall to reveal a secret room.
• The flea is located in the upper-right section — but beware of traps before rescuing it.

5) Hunter’s March

• Enter from the Marrow and rest at the bench for a checkpoint.
• Proceed to the upper-right corridor, where you’ll fight a Skull Ant miniboss.
• Continue right until you reach a jumping course with balloons.
• Bounce upwards to the top-right corner, where the final flea is found.

Hollow Knight Silksong Lost Fleas Wish Rewards

Once all five fleas are collected, return to Mooshka’s caravan. Completing the Lost Fleas wish unlocks two major rewards:

1. Access to Greymoor – Mooshka leads you deeper into Greymoor, opening up new exploration opportunities.

2. Flea Brew – By speaking with other fleas in the caravan, you’ll receive the Flea Brew tool, which temporarily boosts attack power and movement speed.

This makes the quest worth completing early on, as both rewards give Hornet a strong advantage.

The Hollow Knight Silksong Lost Fleas wish is one of the first side quests worth prioritizing. Not only do you unlock shortcuts and lore with Mooshka’s caravan, but the Flea Brew also provides a practical buff for combat and mobility.

If you’re exploring Pharloom, make sure you grab these five Lost Fleas locations before moving on — the rewards will make your journey much smoother.