09-06-2014, 07:09 AM
While it doesn't make sense to end successful franchises, it did happen before. Usually it's done by the main company (i.e. Microsoft not commissioning Rare to make any more of their platformers), but sometimes it's caused by the creator just not feeling like continuing it due to personal reasons. As surprisingly popular as the Mother series is, Itoi has his reasons for not creating the fourth installment.