The Undead Groom was originally one of the Four Bosses that captured the Green Princess, although replaced with Cyclops. This reincarnation of the original is invulnerable, regardless of the Undead Cyclops getting defeated. He is released from the coffin by The Cyclops, and is seen in The Wizard Castle Interior level as a regular enemy.
Attacks & Battle Style
The Undead Groom does not vary in attacks, regardless of the original. He walks around trying to crash the characters to the floor. This attack cannot be blocked, although the player can purposely get crushed by the Cyclops to get stuck in the ground to avoid the attack. The Undead Groom is invunerable, meaning that he does not get damaged in any way. He cannot be defeated unless the Cyclops is defeated, so it is meaningless to attack. As he begins to run toward you, a discordant piano tune is heard.