This mod allows you to add custom voice lines to all characters!
The easiest way to install this is to use the Slime Mod Manager.
If your game isn't modded with BepinEx, DO THAT FIRST!
Simply go to the latest BepinEx release and extract BepinEx_x64_VERSION.zip directly into your game's folder, then run the game once to install BepinEx properly.
This mod also requires Newtonsoft.JSON. You can download a copy of that here. Simply extract to the game's root folder.
Then, go to the latest release of this mod and extract the zip in your game's root folder.
Place voicepacks in BepInEx/Voicepacks (run the game with the mod installed if you don't see this folder).
Voicepacks must be in .VOICEPACK (preferred) or .ZIP (legacy) format! Use the Voicepack Packer to create your own custom voicepacks.
Only use one per character, additional voicepacks will be ignored!
For info on what IDs to use for characters and their various actions, go here.