Crystal Man is one of the many Robot Masters created by Dr. Wily in his never-ending quest for world domination and defeating Mega Man. Crystal Man originates from Mega Man 5 and his main attack is endlessly producing and launching barrages of crystal orbs that can rebound off surfaces and split into multiple smaller orbs upon hitting their targets.
In Mushroom Kingdom Fusion, Crystal Man is seen in a Battle Level called Crystalline Blockade, located in World 5: Gehenna. He fights much like he did in the original game he appeared in. However, unlike most Robot Masters, the player cannot defeat Crystal Man with their attacks as he is invincible. The only way to defeat him is to dodge the crystal orbs that he launches at the player and wait until he runs out. Once the final orb disappears, Crystal Man will fly away and the player is rewarded with a 3-Up Moon to clear the level.