I'm not even sure if this is possible, but this picture seems to imply that there was supposed to be speech in the NDS version: (Text Print Audio?)
So I opened up the Wii version. For testing, I'm just going to look at the English speech stored in speech/speech_e.dat. This is a U8 archive. Uncompressed, it is a collection of 4245 DSP sound files.
If the NDS version had originally included speech, if the files are in the right format and have the right name, the game should be able to detect it. However, it seems the best way to find this out would be to use a debugger, if there are any freeware ones available. Otherwise trial and error could be used...
So I opened up the Wii version. For testing, I'm just going to look at the English speech stored in speech/speech_e.dat. This is a U8 archive. Uncompressed, it is a collection of 4245 DSP sound files.
If the NDS version had originally included speech, if the files are in the right format and have the right name, the game should be able to detect it. However, it seems the best way to find this out would be to use a debugger, if there are any freeware ones available. Otherwise trial and error could be used...