From the Super Mario Wiki
Mario Party 2
In Mario Party 2, the Dueling Glove allows the player to challenge another player to a duel in which they wager coins. The amount of coins is chosen by the user of the glove. Additionally, the duel minigame depends on the stage it is used on. As described in Mario Party 2's character descriptions, it is Wario's favorite item in the game, being the master of dueling; although this does not mean that the item is exclusive or appears more often for him.
Mario Party 3
Dueling Gloves reappear in Mario Party 3, where they have the same use, except that the duel minigames for them are more varied, not depending on the stage. In the PAL version, it is spelled "Duelling Glove".
Mario Party: Star Rush
After a long hiatus, the Dueling Glove, known in-game as the Duel Glove, reappears in Mario Party: Star Rush as a usable item in Toad Scramble. This time, the two competing players wager allies and not coins, as the latter feature is reserved for the Coin Glove in Balloon Bash mode.
Mario Party: The Top 100
Dueling Gloves return in Mario Party: The Top 100, with the purpose being about the same as Mario Party: Star Rush, except the players now wager coins once more.
Super Mario Party
Official description from Mario Party: The Top 100
Just the thing you need to challenge a rival to a duel.
Names in other languages