The final push toward Smithy begins! Mario and the crew battle Boomer, defeat Exor, and cross into Smithy’s world for the climactic assault on the weapon factory. Along the way, Bowser finds a very Bowser-like excuse to stick with the team, Mario grabs the Ultra Hammer, and the party fights its way through the factory’s management before finally confronting Smithy himself. The last Star Piece is within reach, but Smithy isn’t going down without revealing his true power.