After Mario defeated Scarlet Bowser, a Toad Spaceship flied to where Mario and Bowser were. Then, the Captain Toad appear (with his workers) and said to Mario that they were searching around for him and (Scarlet) Bowser, because a disaster occured on Bowser's Castle: Smithy (SMRPG final boss) attacked the castle again and he's dominating the castle! Bowser then wake up and heard what happened. Scared, Bowser decided to fly with the Toads into his castle to solve that... incident. Mario was going to go too, but he noticed a few explosions very far from Gensokyo. It was Reimu defeating Utsuho. Then, a spaceship flied to Gensokyo and Mario decided to follow it.
