About this site, and how its data was put together

This is a one-person, unofficial reference for Pokémon Pokopia Expansion Pass Part 1: Bubbly Basin. It is not affiliated with Nintendo, Game Freak or The Pokémon Company, and it never speaks for them. Everything below is here so you can judge how much to trust the numbers on the other four pages — including the places where the honest answer is that we do not know.

Last updated 10 August 2026

How the dataset was assembled

Two published tables underpin everything here, and they are not the same table. game8 publishes the habitat catalogue: for each habitat, the materials it requires and the Pokémon that appear there. Nintendo Life publishes the Pokédex side: the list of new Pokémon with a primary habitat against each. Each is a lookup in one direction only. Neither can be read backwards from a missing Pokémon to the build that would get it, and the cost of that build, without holding both tables open at once.

So the two were transcribed into a single structure of 36 habitats, each with its material requirements and its exact spawn list as printed, and 50 Pokédex entries. The join between them — species to every habitat that spawns it — is then derived from the habitat table by code rather than typed out by hand, which is the only way to be sure the two directions cannot disagree. That inversion is where the site's actual content comes from: 19 of the 50 Pokémon turn out to have more than one source habitat, a fact that a Pokédex listing one primary habitat per entry structurally cannot show you.

How the two sources were cross-checked

Where both sources say something about the same Pokémon, they were compared, and disagreements were resolved in favour of the authority for that particular kind of fact: habitat contents and material lists from the habitat catalogue, Pokédex membership and spelling from the Pokédex page. Two spellings that circulated in early coverage — “Dreadnaw” and “Brionie” — are wrong; the correct forms are Drednaw and Brionne, and the dataset uses those throughout.

One structural trap deserves its own paragraph, because getting it wrong is the standard way these trackers break. The source spawn tables list Frillish and Jellicent as separate male and female rows. They are one Pokédex entry each. A tracker that counts spawn rows therefore reports a total that is too high, and can cheerfully tell you that you have finished while boxes are still empty. The dataset here keeps both readings and keeps them apart: display uses the original ♂/♀ labels, because that is what the sources print, and every count goes through a function that collapses them first. Nothing on this site counts a raw spawn list.

What is computed here, and what is quoted

The distinction matters, so the pages state it in place rather than burying it here. Quoted means a source published it and we are repeating it.

The dataset behind the tables — habitat names, material names and quantities, spawn lists, the 50 Pokédex entries — comes from game8 and Nintendo Life, cross-checked against each other. The surrounding facts do not: release dates and the price come from Nintendo's own announcements, and the split of what shipped in Part 1 against what is held back for Part 2 was reported by outlets including Insider Gaming, Gamerant and My Nintendo News. Those are different sources with different reliability, and it would be misleading to file them all under the two we compiled the tables from.

Computed means no source published it and it is arithmetic over the dataset, done as the page renders: the value ratio for each habitat, the 74 distinct material types across the region, which Pokémon have exactly one source habitat, which habitats are consequently compulsory, the greedy cover that picks a build order, the material totals that plan costs, and the numbers in every chart. All of the graphics on this site are generated from the dataset at render time for the same reason — they are the one thing here that cannot be got anywhere else. If the dataset were corrected tomorrow, every one of those figures and every bar in every chart would move with it, without anyone editing a sentence.

How single-source claims are marked

Some things are reported by one outlet and nobody else. The contents of Part 2 are the clearest case, and Nintendo Life's account of what the Environment Level chain looks like after the temple is another. Two things that used to be on this list no longer are: the Ocean Temple's material quantities and its request chain both turned out to have three sources, which is how we learned that one of the six quantities is disputed. Rather than dropping them, which would make the site less useful, or laundering them into plain assertions, which would make it dishonest, they are attributed in the sentence that carries them: you will read “according to Nintendo Life, and we have not found a second source” before the claim, not in a footnote underneath it. Where an estimate is also subjective, that is said too.

The same rule runs the other way. When our own table and a source disagree — as they do about whether Totodile and Barboach have one route or several — the discrepancy is shown rather than smoothed over, because a reader who knows two accounts conflict is better equipped than one who has been handed the tidier of the two.

What this site will not do

No official artwork, screenshots or logos. Nothing from Nintendo, Game Freak or The Pokémon Company is reproduced here. Every graphic is drawn by this site out of its own data, and the one video on the homepage is embedded from the official channel on press rather than copied — its poster card is ours, not a frame of the trailer.
No invented figures. No drop rates, no spawn chances, no difficulty ratings, no player counts, and no estimates of our own about how long anything takes. Every number here is either calculated from the dataset in front of you or quoted with the outlet that published it named in the same sentence — the one build-time figure on the site, the “about an hour” on the unlock page, is Nintendo Life's and is labelled as theirs. There is no type filter on the tracker for exactly this reason: the compiled data has no type field, and adding one would mean inventing 50 facts.
No “optimal” claims we cannot back. The planner uses a greedy cover, which is not guaranteed to be the smallest possible set of habitats, and the pages say so where the output appears rather than in the small print.
No accounts, and no data leaving your browser. Ticked Pokémon and built habitats live in this browser's local storage. There is nothing to sign up for, nothing is synced, and clearing site data clears them.

Corrections are welcome

The dataset covers 36 habitats and 50 Pokémon, 48 of which are reachable through habitats, and it was transcribed by one person from two sources that were themselves compiled by hand during a launch week. It will contain mistakes. If you find a habitat whose materials are wrong, a Pokémon spawning somewhere it should not, or a claim on this site that a source does not actually support, please say so — a correction with a pointer to where you saw otherwise is the most useful thing anyone can send.

Email a correction

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