The Disk
While "Shin Onigashima" was ported to the Super Famicom and Game Boy Advance, no talk of porting or remaking "Yuyuki" for other systems has ever emerged. The explanation given was that the game lacked proper copyright clearance from developers and writers, but this explanation is dubious because "Shin Onigashima" was created by the same company and staff. The Disk System's rewriting service ended in September, 2003, but rewriting for "Yuyuki" was terminated a year earlier in October, 2002.