It makes sense that Nintendo would take the stewardship role for this game, as it contains a mode featuring characters and locations from Nintendo's Nazo no Murasame-jou ("The Mysterious Murasame Castle"), a Famicom Disk System game designed by none other than Shigeru Miyamoto. In any case, this is one way for Nintendo to ensure ongoing releases of third-party core games on its systems: by plucking existing ones from Japan and publishing them in North America itself.
