Though Luigi is often considered the perennial "Player Two," his unique personality compared to his straight-man brother Mario has garnered a huge fanbase. The Luigi's Mansion series brought Luigi into his own as a cowardly hero who can overcome any shortcomings for the sake of his friends, and Nintendo marked 2013 as the Year of Luigi to celebrate his importance. Another series that gives Luigi more character is Paper Mario, but a particularly interesting take comes in Paper Mario: The Thousand-Year Door.