IS is technically independent from Nintendo actually. They aren't listed as a subsidiary on the company's press sites. If you want a more recent example, Astral Chain. The copyright notice is "©2019 Nintendo/Platinum Games, Inc."
Platinum Games owns the Astral Chain IP. Nintendo just publishes it. So it is not a co-owned IP. The copyright goes to both of them because Nintendo is the publisher. It is not the same as Nintendo owning the IP.Last edited by Cerebralbore101 - on 01 August 2019