A Gambler (ギャンブラー Gambler) is a Trainer Class introduced in Generation I that initially appeared as old men with a cup and dice. In later games, they appear as much younger men wearing red trench coats along with a hat and flipping a coin in their right hand. Their names have changed several times over the course of the series, sometimes to Gamer and also as PI in the English releases of the Generation IV games. They mostly use and/or -type Pokémon.
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- Gamblers mostly use One-Hit Knockout moves with their Pokémon, showing they prefer to rely on luck more than skill or power in a battle, similar to gambling.