Mario Kart 8 Deluxe 3.0.3 Update: Your Complete Download and Performance Guide
Official Nintendo documentation combined with community findings.
The most efficient way to ensure you have the latest version is through the official update process :
: After updating, you can only play local wireless or LAN matches with others who have also updated to the same version. Nintendo Support How to Download
Mario Kart 8 Deluxe 3.0.3 Update: Your Complete Download and Performance Guide
Official Nintendo documentation combined with community findings.
The most efficient way to ensure you have the latest version is through the official update process :
: After updating, you can only play local wireless or LAN matches with others who have also updated to the same version. Nintendo Support How to Download