Iggy's Illusional Castle is the second Castle that Mario and Luigi Go into. Encountering many Enemies in the Castle, this Castle has an ON/OFF Switch which will summon Pathways to Iggy's Battle. Before entering, Big Boo shows up and battles Mario and Luigi for the Mini-Boss Fight. After that, Mario And Luigi encounter Iggy, but instead of Fighting him he calls the Koopa Bros. which Mario and Luigi fight. After Fighting them, Iggy takes a Cannon to Iggy's Endless Airship and escapes.