How do I import sounds into Super Mario 3D Land?

[DrSkittle]

Hello, I'm currently trying to make a playable Yoshi mod for Super Mario 3D Land since there's a playable Yoshi mod on 3D World but not Land and I know how to import models but I'm not sure about replacing sound files to change Mario's voice to Yoshi's. Everywhere I looked it was 3D World and I figured that wouldn't work since they're different games on different systems. Any help is appreciated, thanks