The patent belongs to the same family as those being used against Palworld developer Pocketpair: https://www.dexerto.com/pokemon/nintendos-pokemon-patent-rejected-after-examiner-cites-2013-fan-game-3388757/

A 2013 Pokemon fan game has been used to reject one of Nintendo's creature-catching patent applications in Japan Nintendo argued the unofficial project shouldn’t count because it infringed copyright, but their argument was denied

The patent belongs to the same family as those being used against Palworld developer Pocketpair: https://www.dexerto.com/pokemon/nintendos-pokemon-patent-rejected-after-examiner-cites-2013-fan-game-3388757/