For in-store pickup, Best Buy offers Mario + Rabbids Kingdom Battle for Nintendo Switch for $18.99. That's the lowest price we could find by a buck. To get this deal:
  1. View Mario + Rabbids Kingdom Battle for Nintendo Switch for $19.99
  2. in cart, select "Shipping" for your delivery method (do not choose in-store pickup at this time)
  3. proceed to checkout
  4. at checkout, in the shipping section, "$1 off order" should appear in green text beside the "Today... at a Best Buy store" option
  5. change your delivery method to this in-store pickup option to drop your total to $18.99