it is a sav file i have completed for TWEWY.i completed the storyline and everything but the things u have to do for specific chapters.i use an m3 (i) Zero,so i guess it could work on r4 and any other flashcarts that use .sav files. oh and i patched some of the japanese audio on the nds rom, idk if it will affect the sav or not. i ONLY patched the BGM.