RUMBLE does not support other mod managers. If you want to use a manager, you must use the RUMBLE Mod Manager, a manager specifically designed for this game.

CustomBattleMusic
A simple mod that lets you add custom battle music with a cool mp3 player.
CHANGELOG
Version 1.0.0
-first release
Version 1.0.2
-added the preview button and an mp3 player in parks