Luigi's Model
Editing Luigi's model is similar to editing a normal model in Luigi's Mansion ,but their is a shit ton of bones for Luigi. Slight body edits is recommended for this if your editing his arms and legs which is hell but for his head and body and shoes its just rigging in the normal tutorial.
There is one major catch for editing Luigi's model is that it will break your facial animations and make them look distorted in game. So you will have to disable the facial animations by injecting this code into your dol.
NO FACIALS AR CODE (US ONLY):044d081c 00000000
Also be sure to delete the txp folder if you are not going to use blinking or changings textures and if you are use txporter and have fun with that hell