Monster Hunter Stories 3 (MHS3)

All Invasive Monsters Locations

Monster Hunter Stories 3: Twisted Reflection Walkthrough Team

Last updated on: March 25, 2026 04:44 AM

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List of All Invasive Monsters Banner
In Monster Hunter Stories 3, Invasive Monsters are bosses that players can force to retreat to unlock dens with endangered eggs. Find the locations of all Invasive Monsters for each area, a list, and how their combat mechanics differ from regular battles.

List of Contents

All Locations
List of Invasive Monsters
How to Beat
What are Invasive Monsters?
How to Encounter
How to Unlock
Related Guides

All Invasive Monster Locations

・Click the arrow on the upper left corner to access the sidebar menu to show the list of points of interests available.

・Use the dropdown menus to select a region and a specific area of the selected region.

・Click the Expand icon on the bottom right to see a full view of the map.

List of Invasive Monsters

Keep track of your progress by clicking the checkbox after defeating the Invasive Monster. We encourage users to Sign up or Log in to save your progress with the Invasive Monsters.

Display all- Only checked- Only unchecked-

✔️	Invasive Monster	Location		Egg Reward	Retreat Requirement
	Invasive Yian Garuga	Overworld View	Azuria	Rathian Egg	・Target its legs with a Slash type weapon.
	Invasive Yian Garuga	Recommended Level: Lv. 10 How to Reach: Naturally encounter during the Endangered Species quest.		Rathian Egg	・Target its legs with a Slash type weapon.
	Invasive Plesioth	Overworld View	Azuria	Lagiacrus Egg	・Hit it with a Fire Attack ・When it enrages, break its head
	Invasive Plesioth	Recommended Level: Lv. 15 How to Reach: Enter the cave connected to the ocean at night in Mirror Lake.		Lagiacrus Egg	・Hit it with a Fire Attack ・When it enrages, break its head
	Invasive Seregios	Overworld View	Azuria	Astalos Egg	・Use a hammer that hits multiple enemies ・Survive the 2nd Turn ・Check the color of its shout and then use an AoE skill with that attribute.
	Invasive Seregios	Recommended Level: Lv. 18 How to Reach: To reach the area found in Northwest part of Azuria, you'll need a flying Monstie and ride the updrafts to reach the elevated area		Astalos Egg
	Invasive Arzuros	Overworld View	Canalta Timberland	Canyne Egg	・Use a weapon that hits multiple enemies and defeat small Arzuros.
	Invasive Arzuros	Recommended Level: Lv. 23 How to Reach: Naturally encounter during the Ward main quest.		Canyne Egg
	Invasive Nerscylla	Overworld View	Canalta Timberland	Nargacuga Egg	・Use a Gunlance With Wyvern’s Fire or Wyvern’s Blaze ・Wait and Build Stamina Until it Attacks You
	Invasive Nerscylla	Recommended Level: Lv. 23 How to Reach: Jump to an opening between two hills separated by a river in Blessing Hill of Canalta Timberland.		Nargacuga Egg
	Invasive Shogun Ceanataur	Overworld View	Canalta Timberland	Mizutsune Egg	・Block attack with Armor Skin ・Block attack with Defensive Ditty Hunting Horn skill
	Invasive Shogun Ceanataur	Recommended Level: Lv. 27 How to Reach: Enter the cave hidden behind the waterfall underneath Lookout Point: Howlinyowl Forest		Mizutsune Egg
	Invasive Diablos	Overworld View	Tarkuan	Tigrex Egg	・Use a Hammer with Meteor Strike ・ Time the Meteor Strike input on the ground’s eruption
	Invasive Diablos	Recommended Level: Lv. 38 How to Reach: Found after proceeding through a long valley at the side of Rococo Rocks to enter Colossal Dragon’s Remains		Tigrex Egg
	Invasive Odogaron	Overworld View	Tarkuan	Zinogre Egg	・Bring a Monster With Mudblight ・ Break its Claws
	Invasive Odogaron	Recommended Level: Lv. 40 How to Reach: Get a boost from the draft near the northeast Catavan Stand in Rococo Rocks		Zinogre Egg	・Bring a Monster With Mudblight ・ Break its Claws
	Invasive Khezu	Overworld View	Serathis	Barioth Egg	・Have a way to remove Paralysis ・Use Speed double attacks ・Use Kinship on prompt
	Invasive Khezu	Recommended Level: Lv. 42 How to Reach: Go through a series of elevated rock formations found on the Serathis region in Glacial Caps		Barioth Egg

How to Beat Invasive Monsters

Collect and Follow Clues from Invasive Monster Tracks

Pick Up the Invasive Tracks

Unlike regular battles, players cannot deplete the health of invasive monsters. Instead, they need to collect Invasive Monster Tracks before the battle so that Rudy can provide the conditions needed in order for it to retreat.

These conditions, in some cases, will require you to switch up your roster and perform specific combat mechanics.
Combat System Guide

Use Nargacuga's Stealth Skill

Use Nargacuga

As a helpful tip, to collect the Invasive Monster Tracks and remain unseen by the Invasive Monster, players can ride a Nargacuga and use its Stealth Skill by pressing the the roar button. The Invasive Monster will now not be alerted as long as stealth is active.

Note however that players can only get a Nargacuga by beating Invasive Nerscylla.

What are Invasive Monsters?

Monsters That Take Over Endangered Species' Habitats

What Are Invasive Monsters
Invasive Monsters encroach on endangered species' habitats further making it difficult for the endangered species to thrive. As a ranger, your job is to get to these endangered eggs by making the Invasive Monster Retreat to its den then collect its egg to repopulate the area.

How to Encounter Invasive Monsters

Adjust the Time to Night

Invasive Monster Only Encountered at Night
Invasive Monsters can only be encountered at nighttime. Players can visit any Catavan Stand to adjust the time from day to night then visit the Monsters' respective spots.

Keep an Eye Out for Distressed Endemic Life

Distressed Endemic Wildlife
Endemic life such as birds and other small animals will be in distress near the areas where the Invasive Monsters area. Watch out for groups of them to lead you to the location where you can fight the Invasive Monster.

How to Unlock Invasive Monsters

Unlocked During The Princess of Vermeil Quest

Unlocked During the Princess of Vermeil
Players will encounter the first Invasive Monster, a Yian Garuga, during the main quest, The Princess of Vermeil. This will be during the part where Eleanor sets out alongside the rangers to retreive an endangered Monstie egg.

Monster Hunter Stories 3 (MHS3) Related Guides

Bosses MH Stories 3.png

List of All Bosses

Main Mission Bosses

All Main Mission Bosses
Azuria (Chapter 1)
Feral Chatacabra	Honed Glavenus
Invasive Yian Garuga	Dual Feral Velocidromes
Feral Gypceros	Magnamalo
Cataracts (Chapter 2)
Feral Great Izuchi	Invasive Arzuros
Feral Somnacanth	Feral Aknosom
Yama Tsukami	-
Galyad (Chapter 3)
Almudron	Feral Ajarakan
Feral Rakna-Kadaki	Rey Dau
Serathis (Chapter 4)
Feral Blangonga	Goss Harag
Malzeno	Arkveld
Bound Azure Rathalos	Bound Lunagaron
Aenshin

Invasive Monster Bosses

All Invasive Monster Bosses
Invasive Yian Garuga	Invasive Seregios
Invasive Plesioth	Invasive Arzuros
Invasive Nerscylla	Invasive Shogun Ceanataur
Invasive Diablos	Invasive Odogaron
Invasive Khezu	-

Feral Monster Bosses

List of All Feral Monsters
Azuria
Feral Paolumu	Feral Nerscylla
Feral Brachydios	-
Canalta Timberland
Feral Tobi-Kadachi	Feral Tetranadon
Feral Bishaten	Feral Espinas
Tarkuan
Feral Barroth	Feral Gravios
Feral Glavenus	Feral Deviljho
Serathis
Feral Legiana	Feral Magnamalo

Elder Dragon Bosses

List of All Elder Dragon Bosses
Namielle	Ibushi and Narwa
Yama Tsukami (Green)	Velkhana
Aenshin	Nergigante

Exotic Monster Bosses

List of All Exotic Monster Bosses
Exotic Seregios	Exotic Velocidrome

Optional Bosses

List of All Optional Bosses
Espinas	Deviljho

Comment

7

Anonymous 7 months

I’m not that good at stealth :( can we get tips and tricks on how to get the invasive monsters clues? And not get seen?

6

Anonymous 7 months

Retreat conditions for Diablo and Odo are reversed.

See more comments (7 Comments)

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Monster Hunter Stories 3: Twisted Reflection Walkthrough Team

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