Mario and Luigi visit Mushrise Park to find the pillow containing Eldream. They run into a Brock named Brickle asking for the pillow. However, Brickle refuses to give up the pillow and runs away. Mario and Luigi make chase until Brickle gets stuck in a fountain. Starlow urges Mario and Luigi to release him somehow and they go underground to raise the water pressure. Brickle is freed from the fountain which causes it to shatter and one of the pieces hit's one of Brickle's inventions, Grobot. Grobot goes haywire and attacks everyone in sight including Brickle. Mario and Luigi have no choice but to fight and destroy the Grobot saving Mushrise Park and certain Brocks.
- Mario and Luigi first acquire their hammers in Mushrise Park.