Harhall's Studio

Harhall's Studio is a studio in Mario & Luigi: Superstar Saga where Harhall worked. Harhall makes shirts that are later sold. Mario and Luigi came here during the game, looking for a Beanstar piece. Harhall had a Beanstar piece, however he would only give it to one of his employees.

Splart
In this mini-game, Mario (being filled up with water) has Luigi hit him over the head with his hammer, which sends a water ball sending forward at their target(s). Mario and Luigi could also optionally return and made every Splart combination possible under Harhall's oversee. The reward for this optional side quest was Harhall Jeans.