You’ll gather several random items while running around the Hisui region in Pokémon Legends: Arceus—largely because crafting is a core mechanic in the title. Game Freak went overboard with the number of items used as materials, even if you’ll only use them once.
You’ll likely only see Pop Pods a handful of times during your playthrough, but they are used to complete another quest for Choy called More New Wares.
This is the hit follow-up quest to the Getting a Hold of New Wares request, in which players helped Choy expand the items he offers in the Jubilife Village general store. The concept for More New Wares is the same as the first request: players have to convince the captain of the Supply Corps, Tao Hua, to allow for another expansion.
For this new version of the request, players will need to collect three Pop Pods and give them to Tao Hua.
Pop Pods are listed as a “sea vegetable used for crafting Scatter Bangs” and act like a balloon trapping air inside if you seal it. Because they are sea vegetables, the best place to find them is along the coast—specifically the Cobalt Coastlands.
You can walk along the inner shores of the Cobalt Coastlands—anywhere spanning from Lunker’s Lair to Sand’s Reach—and have a chance to find Pop Seeds along the coast. They wash up along the sands and can be picked up easily.
Once you get enough of them, head back to the Galaxy Hall and give them to Tao Hua, which will unlock the new items in the store and complete the More New Wares request.