Walmart has confirmed that they have the Splatoon 2 Switch bundle in stock. And that includes online as well — you can buy the bundle on Walmart’s site here (it’s in stock right now, but won’t be for long).
The Splatoon 2 Switch bundle costs $379 and includes the Switch, a copy of Splatoon 2, and a carrying pouch for the console.
The bundle is also available in stores. You can also pay online and pick one up at your local Walmart.