You can't simply go to the My Nintendo Store and buy the Switch 2. To order the Switch 2, you need to log in with an active, paid Nintendo Switch Online account. Once you do that, you can choose either a Switch 2 standalone console or the Mario Kart World bundle and then hit the confirm button to "register your interest" in ordering a Switch 2.

Sam's Club: The Walmart-owned warehouse club had the Nintendo Switch 2 Mario Kart World Bundle on June 5. It will only be available to Sam's Club members. New members can get an annual Sam's Club membership for $25 (was $50).

Not only does the Killswitch protect your new shiny Nintendo tech, but it also provides extra storage for your Switch and Switch 2 game carts. And it doesn't cover up your handheld's USB-C ports, so you can still give your console a quick charge, or hook up a portable USB-C camera on top of the handheld without issue.