Ark has cryopods which do the same thing mechanically, the only major difference being that you don't visually throw them. If you use the vague wording on the patents surrounding pokemon's box mechanics, it falls easily under there, since you are storing a captured creature in a digital storage.

Nintendo is the KING of frivolous patents. They've lost cases on it before, and with palworld being a sony interest, I don't think the usual financial bullying nintendo brings to the table is going to cut it on this one. They need an airtight case and their vague patents (and recent history trying to patent THE LOADING SCREEN and vehicle speed matching for player characters with totk being denied) is a bad look for them in a courtroom. Like the US, the holder of a patent in Japan needs to file suits swiftly to protect the patent, or they risk losing cases (like this one. See "laches defense").

Palworld is back in the top 100 global bestsellers today.