M.U.G.E.N 8v8 Patch is a community-made modification for the M.U.G.E.N fighting engine that adjusts roster, match rules, or gameplay to support 8-versus-8 team matches (either simultaneous or round-robin style), balancing, and UI changes so multiple characters per side can participate. Below is concise, usable content you can reuse (project description, installation guide, compatibility notes, and readme + short promotional blurb).
If you are comfortable with a little "under-the-hood" work, you can enable this yourself in mugen 8v8 patch
—an open-source engine compatible with M.U.G.E.N resources—creators can now script matches that allow 16 characters on screen simultaneously. A New Era of Gameplay Chaos Overview — M
Mugen is a free, open-source fighting game engine created by Elecbyte. It allows users to create and play their own custom fighting games using character and stage assets created by the community. Mugen's flexibility and customizability have made it a beloved platform among fighting game enthusiasts. A New Era of Gameplay Chaos Introduction to
How to Install and Use the Mugen 8v8 Patch