Flow is a user-friendly, layer-based combo editor, made to create (or modify) BCM files for movesets.
Tutorial:
https://docs.google.com/document/d/1OKSHvSz_uA-stm-6O2qlxlNaar-Vs5j7tZ7R-ifz_2Q/edit?usp=sharing
Github Repo (Source Code)
https://github.com/UnleashedGH/Flow