How to redeem game codes on the Nintendo Switch 2

"Digital game codes remain one of the simplest ways to add new titles to a Nintendo library. The Nintendo Switch 2 handles code redemption in a familiar way, building on the same process used on the original Switch. You can redeem a download code directly from the eShop on the console, or through a browser on a phone or desktop."

"A Nintendo Account is required and the Switch 2 must be connected to the internet for on-device redemption. Most codes contain sixteen characters made up of letters and numbers. The characters are displayed on a physical card, on a receipt or in a confirmation email from a retailer. The characters should be entered exactly as supplied. Each code can only be redeemed once and becomes linked to the Nintendo Account used during the process."

Digital game codes provide a quick way to add titles to a Nintendo library. The Nintendo Switch 2 uses the same familiar redemption process as the original Switch. Codes can be redeemed on the console through the eShop or through a browser on a phone or desktop, and both methods link the purchase to the same Nintendo Account so the title appears on any compatible device tied to that account. A Nintendo Account and an internet connection are required for on-device redemption. Most codes use sixteen alphanumeric characters displayed on cards, receipts, or confirmation emails and must be entered exactly once.

Read at Engadget