Which habitats do you actually have to build?
Tick the Bubbly Basin Pokémon you still need. This works out the shortest set of habitats that covers them, with nothing redundant in it, and totals the materials for the whole build. The full list and where each one comes from is in our guide to all 50 Bubbly Basin Pokémon.
Still missing
All 48 habitat spawns are ticked to start with, which is where you are the moment the DLC unlocks. Untick the ones already in your Basin Pokédex.
50 Pokémon and 36 habitats, from a snapshot taken 2026-08-06, the day after the DLC arrived. Two of the fifty are not habitat spawns at all and are shown greyed out — no arrangement of habitats produces them.
The cover is computed greedily and then swept for redundancy, so no habitat in the answer is one whose Pokémon are all supplied by the others. That is a checkable promise; it is not a claim that no shorter list exists. Habitats can be built outside Bubbly Basin too, so treat the list as what to build rather than where.