My god the implications of this are terrifying. It does seem like it'd only affect Japan, but still this would affect the whole gaming world. Those mechanics are stables in the monster catching genre. My favorite monster catcher in the modern age was Cassete Beasts and the only major difference there is you use Cassete tapes instead of a ball. It's stuff like this that makes it impossible for me to support Nintendo anymore even though I love their games. God. Imagine if Microsoft tried to pull the same BS with all the IP and patents they now own between Xbox, Zenimax, and ABK. Imagine if after Doom (the original doom), the publishers had sued all the "Doom Clones". We really REALLY have to rein in all this copyright and patent nonsense. Those laws exist to encourage the creative arts and competition. The way corporations like Nintendo and Disney are abusing them to bully and scare (or outright deny) other creative from doing anything remotely similar to them (often decades later) is insane. Heck, these laws were really only intended to help the individual creatives. Not the massive money printing machines that bought the rights to everything. This remind me of when DC sued Captain Marvel (Shazam) for being a "Superman Clone" (really because the Shazam comic book was out selling Superman) and won because it was really early days for comics back then. It's awful because ever since Captain Marvel (Shazam) has suffered for it. Even stuff like no longer being able to call the book Captain Marvel because during the time it was out of print, Marvel comics came about. DC ended up with the rights and they don't give the character nearly the spotlight it deserves. A very interesting and really good take on Superheroes that people just liked more has been screwed over because a larger company abused the rules to stifle competion (and ultimately the whole industry), and here we are again, and again, and again. I hate it. Nintendo is really the type of company to send their fans a cease and desist for sharing fan art online. Now they're taking that attitude to the whole industry.