Installing this character is standard for M.U.G.E.N 1.0 or 1.1:
This depends on your M.U.G.E.N philosophy.
This is a boss character—not meant for fair play. It can easily crash less optimized M.U.G.E.N builds when using full-screen Hakai attacks. For a balanced experience, look for the “normal” version instead of “Full.”
Unlike Ultra Instinct (which auto-dodges), Ultra Ego in M.U.G.E.N is a risk-reward glass cannon. Here is the optimal strategy: