ROM Hack Extracting .BCH.Z files?

[Zombies9912]

I am wanting to view the model files from hey pikmin! and have decompressed the game with HackingToolkit9ds but most files are .bch.z or .csv. How can I open up the files to access the models? Ive tried Ohana3ds but that only works with normal .Bch files and deleting the z from the extension doesnt make tham compatable. In the end I want to Import enemy meshes and textures to replace enemies in pikmin 1 for gamecube as a mod.

 

[Zombies9912]

Was able to figure it out using the pikmin technical knowlede database. you have to use a decrypt script for yoshi's new island. an dthen use ohana

 

[DobleSG]

Was able to figure it out using the pikmin technical knowlede database. you have to use a decrypt script for yoshi's new island. an dthen use ohana

If you dont mind could you describe how you did it? I'm having the same problem idk how to use the models