Monster Hunter Stories 3 throws you into a world brimming with awe-inspiring creatures, but conquering its invasive monsters is a challenge that truly tests your skills. Knowing when and how to repel these beasts is crucial—not just to snag rare eggs, but to secure powerful materials that boost your armor and weapons later on. Playing at nighttime can make all the difference when hunting these elusive threats, so don’t overlook the timing as you venture out.
Each invasive monster has a distinct way to be temporarily repelled, unlocking access to rare eggs hidden within their Endangered Caves. Whether it’s striking specific body parts or wielding a particular weapon type, these tactics are what set apart successful hunters from the rest. Beyond that, familiarizing yourself with their elemental weaknesses and attack patterns prepares you for tougher fights when the monsters return in full force.
Fully defeating invasive monsters mainly rewards you with Decorations and specialized materials essential for crafting higher-tier gear. Since these monsters respawn in their Endangered Caves, you can farm them repeatedly, though material drops remain sparse—usually between zero and five per encounter. This makes farming invasive monsters a late-game priority when you have the necessary equipment and resources.
Azuria
Invasive Yian Garuga
The very first invasive monster you'll face is the Yian Garuga, making its debut during the Endangered Species quest tutorial. Always pick up shiny clues on the ground before the battle—they hint at the strategy you'll need. To repel this beast, focus your sword attacks on its legs. This approach temporarily forces it to retreat, granting access to the rare Rathian egg.
For rematches, consider using skills like Soulseer to make the Garuga miss its attacks, turning the tide decisively in your favor.
| Element | Weakness | Attack Type | Egg Reward |
|---|---|---|---|
| Fire Poison | Water | Technical (Normal) Power (Invading) Power (Enraged) | Rathian |
Invasive Plesioth
Track the Invasive Plesioth by following the northern river into a cave. To repel this aquatic menace, concentrate attacks on its head using fire-element strikes, which will quickly shatter its defenses and force a retreat.
| Element | Weakness | Attack Type | Egg Reward |
|---|---|---|---|
| Water | Fire | Technical (Normal) | Lagiacrus |
Invasive Seregios
Starting your hunt near the Mirror Lake campsite puts you in prime position to challenge the Invasive Seregios. Gathering clues before the fight is vital. You’ll need a hammer specifically to perform an AOE hammer attack that sends the Seregios’s shards right back at it. This unique mechanic is key to repelling it effectively.
| Element | Weakness | Attack Type | Egg Reward |
|---|---|---|---|
| Physical | Electricity Ice | Power (Normal) Speed (Invading) | Astalos |
Canalta Timberland
Invasive Arzuros
The Invasive Arzuros offers a fascinating fight tied to the main quest and helping the local tribe reclaim their Canyne. This monster relies on honey to summon allies and unleash devastating attacks. To prevent its honey revival, prioritize eliminating the adds until the Arzuros’s honey stash is depleted.
| Element | Weakness | Attack Type | Egg Reward |
|---|---|---|---|
| Physical | Fire | Power (Normal) Technical (Invading) | Canyne |
Invasive Nerscylla
Start from Blessing Hill campsite and head east to find Invasive Nerscylla. This creature dodges most attacks, so equipping a gunlance helps with guaranteed hits using Wyvern’s Fire or Wyvern’s Blaze. Attack when the monster telegraphs its Invading form with a red targeting line.
| Element | Weakness | Attack Type | Egg Reward |
|---|---|---|---|
| Physical | Fire | Technical (Normal) Speed (Invading) | Nargacuga |
Invasive Shogun Ceanataur
Navigate the river path past a waterfall to enter the cave housing the Invasive Shogun Ceanataur. Utilize the minimap to follow clues ahead of time. Defensive preparations are critical—either drink Guard potions, use Amorskin or Mega Armorskin, or bring a monstie with defensive skills such as Gravios’s guard ability.
Either gunlance or hammer works for their defensive benefits, but the horn is superior for its party-wide defensive buffs. These defenses must be Medium (M) or Large (L) size to be effective against the monster’s attacks.
| Element | Weakness | Attack Type | Egg Reward |
|---|---|---|---|
| Water | Electricity Ice | Power (Normal) Speed (Invading) | Mizutsune |
Tarkuan
Invasive Odogaron
Reaching the Invasive Odogaron is a bit trickier, requiring you to navigate air currents and scale a wall. Bringing a monstie capable of using Mudlight is essential. Break its claws through targeted attacks to repel the monster successfully.
| Element | Weakness | Attack Type | Egg Reward |
|---|---|---|---|
| Physical | Ice | Speed (Normal) | Zinogre |
Invasive Diablos
Invasive Diablos is a relentless foe known for its stun attacks, offering a brief window to strike before burrowing underground. Take this time to play a tense game of whack-a-mole by hitting the exact hole it emerges from, indicated by rising dirt. Use a hammer outfitted with the Meteor Attack skill to land critical hits and force it to retreat.
| Element | Weakness | Attack Type | Egg Reward |
|---|---|---|---|
| Physical | Ice Water | Power (Normal) | Tigrex |
Serathis
Invasive Khezu
To repel the elusive Invasive Khezu, teamwork with your monstie is key—focus on chaining Double Attacks and executing Mounted Attacks. Enhancing your Kinship Gauge speed with Decorations or equipping your monstie with specific genes can make this feat easier.
| Element | Weakness | Attack Type | Egg Reward |
|---|---|---|---|
| Physical | – | Technical (Normal) Power (Invasive) | Barioth |
