
The messiest part of looking up Grotadmorv is that one clean search can dump you into two completely different Pokémon systems at once. You see Muk stats on one page, a swamp fishing spot on another, and suddenly it looks like Pokémon Sun and Moon has biome-restoration rules it never actually used. Here is the clean answer first: Grotadmorv is simply Muk in French. If you are playing Pokémon Sun and Moon or using the Pokémon Sun and Moon Special Demo Version as your reference point, the solid fact you can trust is the species identity: Muk, Poison type, National Pokédex #0089. The “Pokopia” terms attached to Grotadmorv belong to a different ruleset and should not be copied over as Sun and Moon spawn instructions.
That distinction saves a lot of wasted time. It also explains why keywords like Disorder ability, swamp fishing spot, fishing rod, and muddy water feel wrong if your brain is locked onto Alola. They are not standard Sun and Moon encounter language. They read like habitat conditions from a world-building game, not route-by-route encounter data from the 3DS titles.
The reliable core is straightforward. Grotadmorv is the French name for Muk, the classic Gen 1 Poison-type Pokémon first indexed as National Dex #0089. The stat line associated with that identity also matches Muk’s long-established profile: HP 105 / Attack 105 / Defense 75 / Special Attack 65 / Special Defense 100 / Speed 50. So if your goal is to sort out a Pokédex entry, compare movesets, or verify whether a page is talking about the same species, that identity chain is not in dispute.
Where players get tripped up is the number mismatch. Some recent Pokopia-related material labels Grotadmorv as #092. That does not line up with Muk’s National Dex number, so the safest reading is that #092 is a game-specific listing or habitat index inside Pokopia coverage rather than a correction to Muk’s actual species number. If you are building a Sun and Moon reference sheet, keep #0089 as your species anchor and treat #092 as a separate, likely Pokopia-only index until a fuller in-game dex confirms exactly how that numbering works.
The reason this search term feels cursed is that Pokopia appears to use a very different progression loop. Current reporting describes Pokopia’s Pokédex as habitat-based rather than catch-based. In other words, Pokémon are added by restoring or tending the environment so they return to a natural biome, not by running into grass, hooking them in water, and catching them the way mainline games teach you to think. That is a huge mechanical difference.

For a Sun and Moon player, that means Pokopia terms should be read like environmental requirements, not traditional spawn tables. A phrase like “muddy water” is probably not the same thing as a battle arena effect or a move interaction. A phrase like “swamp fishing spot” is probably not equivalent to a named Alola route where you fish for an encounter. And an ability tag like “Disorder” does not read like a standard mainline battle ability at all. It sounds more like a habitat behavior, personality effect, or ecology marker attached to how that Pokémon affects the world around it.
This matters even more if your search started from the Pokémon Sun and Moon Special Demo Version. The demo is a limited slice of the Alola experience, not the place you should expect a full Pokédex-routing framework or a complete species-location database. So if your goal is a real Pokédex entry or spawn-location answer, the full games and the species’ standard identity are the reliable starting point, not a cross-game keyword mashup.
If you are sorting Pokédex entries for Pokémon Sun and Moon, use this order of operations. First, strip the language issue out of the problem: Grotadmorv = Muk. Second, check whether the page you are reading is talking about the standard species or an Alola-specific form entry. Third, ignore any habitat-restoration jargon unless the source clearly states it is for Pokopia rather than for the 3DS games.

That sounds basic, but it fixes most of the confusion immediately. In Sun and Moon, Muk-related research can already get messy because Alola has regional forms and the game’s own Pokédex framing is tied to Alola rather than just the old National numbering. So the last thing you want is a second layer of confusion from another game’s ecosystem mechanics. If a page gives you classic Muk stats and French naming, it is probably safe on species identity. If the same page suddenly shifts into fishing rod requirements, swamp habitat notes, or a behavior called Disorder, you have crossed into Pokopia material and should stop treating it as an Alola spawn guide.
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Here is the honest version, because pretending certainty helps nobody: the supplied evidence does not give a fully verified Sun and Moon route table for Muk or Grimer, so I am not going to invent route numbers from memory and call them confirmed. What the evidence does support is that current Pokopia discussion treats species appearances as habitat-condition problems, with weather, time-of-day, and specialties all apparently relevant across that game’s dex structure.
There is also one notable third-party clue set tied specifically to Grotadmorv in Pokopia. That guide lists a swamp fishing spot, a required fishing rod, muddy water, and even “any seat” as part of the setup, while also attaching the Disorder trait to the Pokémon. Useful as a lead? Yes. Strong enough to treat as fully settled fact for Sun and Moon? No. The best use of that information is as a tentative Pokopia habitat note, not as a mainline spawn location.
If you are researching spawn locations for a personal database, the practical move is to separate your notes into two columns: one for confirmed species identity and one for game-specific appearance rules. Muk’s identity is high confidence. Pokopia’s swamp-fishing setup is lower confidence and belongs in a different bucket until corroborated by a fuller species list or official habitat entry.

If you are the kind of player who keeps a notebook, spreadsheet, or route-planning doc, this is one of those entries that benefits from being written down carefully. Put Grotadmorv / Muk on one line, mark it as Poison type, record National Dex #0089, and then flag any Pokopia-specific details with a confidence note. I would label the current habitat clue set as something like: “Pokopia only, unconfirmed beyond third-party guide; swamp fishing spot, fishing rod, muddy water, possible location 186.” That keeps the information usable without letting it contaminate your Sun and Moon data.
The same approach works for Pokédex entries in any language. Start with the species identity, then the form, then the game, then the mechanic. If you reverse that order, this topic turns into a swamp fast. One wrong label and suddenly Muk looks like it needs biome restoration and furniture placement to appear in a mainline game. It does not. The naming overlap is the trap.