Why not? It's your work. You can't really be competing with Nintendo, because they can't create that same picture, because they don't employ you. Also you are extremely unlikely to be making a material impact on the bottom line of a multi-billion-dollar international media company.
Also, this is a thing many people already do, so I'm really advocating that it's fine for them to continue doing it.
Also, this is a thing many people already do, so I'm really advocating that it's fine for them to continue doing it.