Hey WarioForums! It's been a while; Never noticed this until relatively recently, thought I'd make a thread about it.
Basically, Wario Land 4 utilizes voice samples spliced up and mixed as if a DJ is mixing them: hence the constant pitch shifting and why a lot of the stuff he says are...
Some of the voice samples in this pack were used for the title theme of Wario Land 4 on Gameboy Advance!
If anyone could look through the pack and figure out which files were used in-game, that would be really helpful!