Mr. Write is a character in The Legend of Zelda: Link's Awakening. He is obviously based off of Dr. Wright from SimCity, not only because of his name though he looks strikingly similar. He depressingly writes a multitude of letters to a varying amount of people, though he never gets a reply.
Eventually Link will deliver a letter to him from another character, and to thank him he'll give Link the broom. The only purpose of the broom is to give it to Mrs. Ulrira in a complex trading sequence that starts with the Yoshi Doll and ends with the Magnifying Glass.