Best Buy offers the Nintendo Pokémon Go Plus Bracelet for $34.99. Opt for in-store pickup to avoid the $3.99 shipping fee. Although that's list price, it's a rare opportunity to purchase this popular item without a significant markup. (Amazon had it for the same price for a brief time last week.) For use with Pokémon Go, it connects to a smartphone and alerts when a Pokémon is close by or when nearing a PokéStop.