This is a savestate practice mod that can be installed on any PC version of Undertale. Included is a .csx file that can be installed using UndertaleModTool as well as a .bps patch for 1.001 Linux that can be installed with Floating IPS. Once the mod is installed, you can select a save slot with 0-9, save with S, and load with L. The savestates are saved in your normal save folder as savestate_#.