Ok the problem is you didn't put the textures inside Smash explorer then pack it
I thought i did. I put the new textures into the original model.nut then put it in sm4sh explorer and then built it.
Here's the log to prove it
5/29/2016 9:20:41 PM INFO : Starting compilation of the mod (release)
5/29/2016 9:20:41 PM DEBUG: Export folder: 'C:\Users\Frankie\Downloads\Wiiumod\sm4shexplorer 0.06.4b\sm4shexplorer 0.06.4b\export\release\'
5/29/2016 9:20:41 PM DEBUG: Rebuilding partition 'data'...
5/29/2016 9:20:41 PM INFO : Packaging 'data'... to 'C:\Users\Frankie\Downloads\Wiiumod\sm4shexplorer 0.06.4b\sm4shexplorer 0.06.4b\export\release\content\patch\'
5/29/2016 9:20:42 PM INFO : Extracting 15 files from fighter/ness/model/body/c05/...
5/29/2016 9:20:42 PM INFO : Done!
5/29/2016 9:20:42 PM INFO : Packing 'data/fighter/ness/model/body/c05/' with 15 new files...
5/29/2016 9:20:42 PM INFO : Rebuilding 'resource'...
5/29/2016 9:20:42 PM DEBUG: Rebuilding resource file 'resource'...
5/29/2016 9:20:46 PM DEBUG: Rebuilding partition 'data(us_en)'...
5/29/2016 9:20:46 PM INFO : Rebuilding 'resource(us_en)'...
5/29/2016 9:20:46 PM DEBUG: Rebuilding resource file 'resource(us_en)'...
5/29/2016 9:20:50 PM DEBUG: Rebuilding partition 'data(us_fr)'...
5/29/2016 9:20:50 PM INFO : Rebuilding 'resource(us_fr)'...
5/29/2016 9:20:50 PM DEBUG: Rebuilding resource file 'resource(us_fr)'...
5/29/2016 9:20:54 PM DEBUG: Rebuilding partition 'data(us_sp)'...
5/29/2016 9:20:54 PM INFO : Rebuilding 'resource(us_sp)'...
5/29/2016 9:20:54 PM DEBUG: Rebuilding resource file 'resource(us_sp)'...
5/29/2016 9:20:58 PM INFO : Rebuilding 'patchlist'...
5/29/2016 9:20:58 PM INFO : Completed compilation of the mod (release)