This is only a (small) part of the crash report, as it only says what went wrong, not where. Please post the full report (in a spoiler).
I haven't worked with sounds in a long time, but I think you only need to specify all the possible sounds (jigglypuff0, jigglypuff1 etc), and they need to be all lowercase, and IIRC the path is relative to "assets\*modid*\sounds\".