>>35345878giritina could pretty easily be reworked to be decently scary, but then again its a ghost type.
My idea:
>Gen 8 gives us kanto remakes>Postgame has a mewtwo mission in the cerulean cave>mewtwo is portrayed as a psychotic freak of science with godlike powers. It hunts you down for entering its cave while this theme plays. https://www.youtube.com/watch?v=oq-59Trq4cQ