Mr. Passion

Mr. Passion is a boss in Mother 3. Duster confronts this ghostly composer alone during Chapter 2 in the castle before he recovers the Noble Spittoon. This first move should be to toss a Smoke Bomb to make him cry, which reduces the accuracy of his attacks throughout the battle. After this, the best move is the Hypno-Pendulum, which works on him nearly 100% of the time. While he's asleep he can be easily combo-attacked. Another wise move would be to stock up on Beef Jerky before the battle, which can be endlessly given by one ghost who will trade them for Rotten Eclairs. Mr. Passion is an optional boss in Chapter 5, but he is called Lord Passion then and is stronger than he originally was.

Trivia

 * The background music during the fight is a medley of classical themes, fitting his composer persona.