From the Super Mario Wiki
Hammer Bro in the Mushroom Field
in Mario Party Advance
The Mushroom Field is an area in Mario Party Advance. It is located in the Desert Area of Shroom City.
When players decide to stop here, they meet Hammer Bro, who is practicing his hammer throwing. His quest, Hammerama, involves players in a little game with him. All they must do is throw their hammer farther than Hammer Bro to win. Doing this rewards them with the Gaddget, Mini B-Ball.
Names in other languages
Arena del Martello (by Hammer Bro)
Arena of the Hammer