From the Super Mario Wiki
The Town Koopa Bank is one of the places in Mario Party Advance that is located in the Town Area of Shroom City.
When the player decides to stop here, they will meet Koopa. He needs help since someone has just stolen all the coins from the safe. His quest, Probably A Robbery?, is a mystery where Shroomlock comes by to help. After Koopa gives him the details, Shroomlock asks the player to interview the three suspects: Goombob, Paratroopa, and Mr. I. Solving the case will reward the player with the Gaddget Card Trick.
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