Because MMFR uses an advanced engine, standard randomizers can sometimes break its unique scripts (like Mega Evolution). Using the Universal Pokemon Randomizer (UPR) is the standard method, but you must follow specific steps to ensure stability.
Here is a preset for Mega Moemon randomizer: mega moemon fire red randomizer better
Standard randomizers break Moemon's custom sprites, type changes, and Mega Evolutions. You need a specific method . Because MMFR uses an advanced engine, standard randomizers
: A standout feature that allows players to use Mega Evolutions in battle once they obtain the Mega Bracelet and corresponding Mega Stones. Quality of Life Improvements : Unlimited TM use and reusable HMs. The ability to run from battles right from the start. Because MMFR uses an advanced engine