Lord Passion

Lord Passion is an optional boss in Mother 3. He is the tougher form of Mr. Passion and is fought in the same room in Osohe Castle; however, he can only be fought in Chapter 5, making many people not know he exists due to the area being entirely optional to explore during the chapter. Defeating him allows Lucas and company to receive the Mystical Shoes, a powerful weapon for Duster.

Battle Memory description
"This spirited musician can't control his tempo. In fact, his passion is just hitting a crescendo."