Mega Man III Ultimate is a rebalance of the game's level designs, with special attention paid to the Doc Robot and Wily stages, extending from kuja killer's Mega Man 3 Improvement hack and serving as a predecessor to the TheSkipper1995's later Mega Man 3 Revamped. Between the revamped difficulty and inclusions of kuja killer's improvements, Mega Man III Ultimate is "how Mega Man III should have been back in 1990".