The cliff wind shredded my map as the Diablos vanished into the sand. You have one clean intercept; miss it and the den stays sealed. I learned the timing by burning a few saves so you don’t have to.
I’m going to walk you through the exact path, the timing trick with the Hammer Spinning Meteor, and the habitat setup that makes the Grimclaw Tigrex appear early. Read it like a checklist and keep your saves close.

The southern cliffs smell of scratched rock — How to beat the Invasive Diablos in Monster Hunter Stories 3
Real quick: this fight is less about raw damage and more about timing a single intercept. Think of that moment like reading a poker tell; the whole encounter turns on one visible cue.
Where is the Invasive Diablos located?
The Invasive Diablos spawns in the southern sector of Tarkuan (marked “7” in the map above). If you approach from the east, drop down from the cliffside, head southeast through the cut in the rocks, follow the ravine to its end, climb the wall, and you’ll find the encounter. Players on Switch, Steam, or other Capcom-licensed platforms report the same spawn points across versions.
How do I beat the Invasive Diablos?
Get a Hammer with the Spinning Meteor skill and stand your ground until the Diablos enters its Invasive state. It will plunge underground and create three holes; one hole will emit small rocks right before it erupts. When those rocks pop, press attack to intercept the Diablos as it re-emerges.
If you hit the timing with Spinning Meteor, the Diablos will retreat and reveal an endangered Tigrex den. If you swing too early or pick the wrong hole, the Diablos will burst from another opening and cart you. This method is well-documented in community threads on Steam and is visible in footage shared by Moyens I/O and other outlets.

The Colossal Dragon’s Remains smells of old thunder — How to obtain the Grimclaw Tigrex mutation in Monster Hunter Stories 3
Two conditions must be met before the Grimclaw variant can appear: raise the Tigrex or Brute Tigrex to Ecosystem Rank S, and place them into a habitat that contains four or more Power-type monsties.
How do I get the Grimclaw Tigrex?
The fastest route is the Colossal Dragon’s Remains. It already hosts heavy hitters like Almudron; freeing and placing Tigrex and Brute Tigrex there adds two more Power-types to the roster. Once the location counts four Power-type monsties, the Grimclaw variant will start appearing in random dens—search those dens and you’ll find an egg to hatch.
This method has been tested in community guides and forum threads across Nintendo and Steam discussion boards; if you’re active on Discord hunting groups you’ll find hatch timestamps and spawn confirmations that line up with this approach.

Hatching strategy: once you have the egg, raise the hatchling alongside a Brute Tigrex if possible to push its Ecosystem Rank quicker. Keep checking the Colossal Dragon’s Remains dens—spawns are random but common once the habitat threshold is met.
I’ve walked players through this live, clipped the timing in video guides, and tracked spawn reports across Moyens I/O, Steam threads, and Nintendo communities—so you’re following tested steps, not guesswork.
Ready to bait the Diablos and chase a Grimclaw egg down the ravine?