In Hollow Knight: Silksong, the quest to rescue lost fleas stands out as one of the most rewarding side activities. These small, winged creatures are scattered across Pharloom’s diverse regions, often hidden behind precarious platforms, breakable walls, or guarded by enemies. Collecting them all not only grants the prestigious **Fleafriend achievement** but also progresses the Flea Caravan, unlocking vital tools like Flea Brew and interactive NPCs such as Vog for maps.
The journey begins in The Marrow with Fleamaster Mooshka and their companions. As you free fleas, the caravan relocates to new areas—Greymoor after 5, Blasted Steps around 15-20, and Pale Lake at 25+—offering benches, shops, and story beats. This guide provides an original roadmap with region-by-region breakdowns, ability prerequisites, and strategic tips to streamline your hunt.
Understanding the Flea Quest Mechanics
Each flea rescue involves precise platforming, combat, or puzzle-solving. Fleas appear as caged bugs or resting NPCs, audible by snoring or buzzing. Free them by slashing vines, breaking walls, or defeating nearby foes. Progress triggers caravan moves, which you can follow for convenience.
- Key Milestones: 5 fleas for first move and Flea Brew; 15 for Flea Finder; 30 for Fleafriend and final rewards.
- Essential Abilities: Cling Grip for walls, Faydown Cloak (double jump), Swift Step (air dash), Clawline.
- Tools Unlocked: Flea Maps from Vog after flea #20, enhancing late-game hunts.
Plan routes by region unlock order, backtracking with new abilities. Early fleas cluster in accessible spots; later ones demand Act 2 progress like beating Last Judge.
Early Fleas: The Marrow and Initial Regions (1-5)
Start in The Marrow, the caravan’s origin. Activate the bellshrine by defeating Bell Beast to access upper paths.
| Flea # | Region | Path Details | Requirements |
|---|---|---|---|
| 1 | The Marrow | Climb spike traps and platforms from lower section; top-right chamber past fast travel and bench. Slash vines. | Basic platforming |
| 2 | Deep Docks | Behind breakable wall left of Bellway station. | — |
| 3 | Deep Docks | Left from Swift Step shrine; upper-right lever. | Swift Step |
| 4 | Hunter’s March | Upper left path; listen for snoring. | Platforming |
| 5 | Shellwood | Central chamber top, past Shakra encounter. | Spike traps, disappearing platforms |
After #5, caravan shifts to Greymoor. Grab Flea Brew here—a tool for brewing potions from flea essence.
Mid-Game Fleas: Greymoor to Blasted Steps (6-15)
Greymoor’s towers demand Cling Grip. Backtrack with it for missed fleas.
- #6: Greymoor – Early post-move spot.
- #7: Shellwood – Below Gahlias section from top.
- #8: Bellhart – Upper Bellveins tunnel after Sister Splinter.
- #9: Greymoor (Kratt) – NPC behind breakable wall above Halfway Home; unlocks spa.
- #10: Greymoor – Top of left tower.
Acquire Clawline and Faydown Cloak in Mount Fay for easier navigation.
| Flea # | Region | Key Challenge |
|---|---|---|
| 11 | Blasted Steps | Top left of bellway station. |
| 12 | Choral Chambers | Precarious platforms. |
| 13 | Underworks | Series of Cogwork Haulers. |
| 14 | Whispering Vaults | Hidden alcove. |
| 15 | Sinner’s Road | Muckroach guard. |
Hit 15 for Flea Finder. Move caravan to Blasted Steps post-Last Judge.
Advanced Fleas: Slab to Sands (16-20)
These require Act 2 traversal. Giant fleas and Vog appear here.
- #16: Memorium – Giant Flea hunt.
- #17-18: The Slab – Dual spots; open shortcuts.
- #19: Whispering Vaults – Off-map via alternate paths.
- #20: Putrified Ducts – Unlocks Vog at caravan for Flea Maps.
Vog’s maps reveal remaining flea spots in visited areas—crucial for efficiency.
Late-Game Fleas: Sands to Wormways (21-30)
Final stretch spans harsh terrains. Faydown Cloak shines in vertical challenges.
| Flea # | Region | Access Notes | Requirements |
|---|---|---|---|
| 21 | Sands of Karak | Deep sands traversal. | Cling Grip |
| 22 | Far Fields | Open fields exploration. | — |
| 23 | Choral Chambers | Return with upgrades. | Faydown Cloak |
| 24 | Bilewater | Behind breakable wall; defeat Snitchflies. | — |
| 25 | Exhaust Organ/Bilewater | Via The Mist fast travel. | Mist traversal |
| 26 | Underworks/Wisp Thicket | Breakable ceiling platforming. | Cling Grip, Cloak |
| 27 | Bilewater | Above secret bench. | Cling Grip |
| 28 | Sinner’s Road | Late backtrack. | — |
| 29 | Deep Docks | Advanced upper paths. | Swift Step |
| 30 | Wormways | Final deep dive; triggers achievement. | All prior |
Post-30, caravan heads to Pale Lake for rewards: enhanced brews, spa access, full Flea Maps.
Tips for Efficient Flea Hunting
Maximize success with these strategies:
- Mark maps early; Vog fills gaps later.
- Follow caravan moves for safe hubs.
- Practice platforming sequences—spikes and haulers punish mistakes.
- Combine with main quests: Many fleas align with ability unlocks.
- Save before tricky spots like Memorium giant.
Common Challenges and Solutions
Breakable Walls: Dash repeatedly or use charged needle.
Vertical Climbs: Cling Grip + Cloak combo essential.
Enemy Guards: Clear Snitchflies/Muckroaches first.
Backtracking: Use bellways and fast travel.
FAQ
Q: What do I get for all 30 fleas?
A: Fleafriend achievement, Pale Lake caravan, Vog’s full shop, spa, ultimate brews.
Q: Can I miss fleas permanently?
No, all accessible post-story with abilities.
Q: Best order to collect?
Milestone-based: 1-5 Marrow/Greymoor, 6-15 mid, 16-30 with maps.
Q: Requirements for Faydown Cloak?
Mount Fay post-Clawline; enables double jump.
Q: Where’s Vog?
Caravan after #20; sells maps.
Why Collect Fleas? Beyond Achievements
This quest enriches Pharloom lore, revealing flea society and Mooshka’s leadership. Tools like Flea Brew boost silk supply for upgrades, while the spa heals status effects. It’s a perfect 100% completion pillar, blending exploration with progression. Dive in, rescue every flea, and claim your Fleafriend glory!
References
- Hollow Knight: Silksong – All Flea Locations | Fleafriend Achievement — YouTube (Vegathron). 2023.
- Where To Find All Lost Fleas In Hollow Knight: Silksong — GameSpot. 2023-06-01. https://www.gamespot.com/gallery/hollow-knight-silksong-lost-fleas-guide/2900-6990/
- Flea – Hollow Knight Wiki — Hollow Knight Wiki (Fandom). 2023. https://hollowknight.wiki/w/Flea
- How to Find EVERY Flea Location – Fleafriend Achievement — YouTube. 2023.