Update 4: Bumped to the top again. Pokemon Let’s Go Pikachu + Poke Ball Plus is live on Amazon.
Update 3 (6/14): Poke Ball Plus is up on Amazon Canada.
Update 2: Bumped to the top again. Standalone Poke Ball Plus live on Amazon.
Update: Bumped to the top. Amazon now has the Eevee bundle here.
Original (6/13): GameStop has started taking pre-orders for the Poke Ball Plus. If interested, you can reserve it here. Nintendo will release Poke Ball Plus on November 16.
You can also pre-order the Pokemon: Let’s Go, Pikachu / Eevee bundles with Poke Ball Plus here.