The way these were written results in MUGEN looking for their .def file inside the Chars folder, instead of each character's own individual folder.
Remember, you don't need to put a extension when the character's folder name is the same as their DEF file. 
cvsryu/cvsryu_normal.def, random, music=sound/Ryu_Theme.mp3, order=1
cvskyo/cvskyo_normal.def, random, music=sound/Esaka_Forever_(Kyo_Kusanagi).mp3
cvsken/cvsken_normal.def, random, music=sound/Theme_of_Ken.mp3
cvshaohmaru/cvshaohmaru_normal.def, random, music=sound/GOES_A_SYOTEN-GAI!.mp3
cvsgouki/cvsgouki_normal.def, random, music=sound/Theme_of_GOUKI_Type_1.mp3
cvssakura/cvssakura_normal.def, random, music=sound/Theme_of_Sakura_SFIV.mp3
cvsrugal, random, music=sound/The_RR_Rugal_Bernstein.mp3
cvsvega/cvsvega_normal.def, random, music=sound/Fatal_depth_-Theme_of_VEGA_Type._1-.mp3
cvsgeese/cvsgeese_normal.def, random, music=sound/Stiff_Shoulders_for_Geese_(Geese_Theme).mp3
cvszangief/cvszangief_normal.def, random, music=sound/Theme_of_Zangief_-SFIV_Arrange-.mp3
cvsnakoruru, random, music=sound/15._Silent_Hill_(Nakoruru_Stage).mp3
cvsdan, random, music=sound/Performance_-Theme_of_DAN-.mp3
cvsyun, random, music=sound/Yun_&_Yang_Stage_-CROWDED_STREET_[Console_Edit]-.mp3
cvstodo, random, music=sound/05_-_NEBUTA.mp3
cvshayato, random, music=sound/Dear_Falling_Angel_(Krizalid-2).mp3
cvskuroko, random, music=sound/ART_OF_FIGHT_~Dragon_Tiger_and_Swallow_Art_of_Fighting_Team.mp3