Watt Trader

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.

Games
In Sword and Shield, Watt Traders can be found in the following Wild Area locations of the Galar region:

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.
 * Meetup Spot
 * East Lake Axewell
 * Dappled Grove
 * Giant's Seat
 * Bridge Field
 * Hammerlocke Hills
 * Giant's Cap

Rotom Rally
The Rotom Rally is a racing competition that requires the player to ride the Rotom Bike  and reach 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 custominze 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.