Igor

Igor is the Boo that runs the shop in Boo's Mansion during the events of Paper Mario. When Mario first enters the shop, Igor will refuse to sell him anything under the orders of Lady Bow. Once Lady Bow has joined his party, his shop is open for Mario. There is also a letter that Mario has to deliver to Igor for a Star Piece.

Igor shares his name with that of the traditional assistant of the mad scientist in novels and movies such as Frankenstein.

Trivia
Igor is the only clerk with a known name.