From the Super Mario Wiki
In Mario Party 2, when used the Plunder Chest randomly chooses another player that is holding an item, steals their items and gives them to the player. In Mario Party 3, players can choose who they want to steal from, however if the person being targeted has two or three items, the item that is stolen is picked at random.
There is a much rarer version of the Plunder Chest in Mario Party 3, called the Barter Box, which swaps all of the player's items with all of the targeted player's items.
Names in other languages