Watt Traders are NPCs introduced in Generation VIII. They can be found in the Wild Area and sell items in exchange for Watts. They also organize the Rotom Rally where the Player can participate in to earn Watts.
Each Watt Trader's stock follows a schedule that changes daily, and always consists of a different type of Poké Ball, a Wishing Piece, and five distinct TRs .
The Rotom Rally is a racing competition that requires the player to ride the Rotom Bike and race to the location of another Watt Trader in within a predefined amount of time. The destination can be any Watt Trader the player has previously visited. After completing the Rotom Rally, the attempt is graded with a score, and the player earn some Watts as their reward.
Outfit color change
Watt Traders will allow the player to customize the color of the Rotom Bike outfit for free without paying for it. They will offer colors that match the type or types of the first Pokémon in the player's party, as well as Rotom colors.
Rotom Bike upgrade
Watt Traders will improve the Rotom Bike for the player by boosting its speed. They can improve the bike up to three times; they will charge 1,000W for the first upgrade, 3,000W for the second, and 5,000W for the third.