Need some help with Gecko OS

[Raichu Girl]

I've been using gecko for a few years now with stage texture, and character texture, and moveset modding, and music as well. Just a few months ago I learned that sfx can be changed with gecko too, so I looked and downloaded the necessary things for it to work.
Then I tested it by replacing pikachus voice for Raichus, and checked in the settings of the game it worked. Then I tryed playing and cho

 

[Raichu Girl]

Choose pikachu and after choosing a stage the game freezes right there. I need help on how to fix this.