QR code

A QR code is a square black and white image that is designed to be scanned in order to visit websites, learn details about products, and more. In Splatoon 3, players can receive in-game content through scanning special QR codes via the QR Code Reader in SplatNet 3.

Splatoon 3
For the release of on 2022-09-09, the official @SplatoonJP Twitter account posted the first special QR code. By scanning it, players were awarded a special Splashtag banner.

The second QR code, released on 2022-10-08, was distributed in commemoration of Splatoon 3 appearance at Nintendo Live 2022 and the associated Deep Cut Concert at Nintendo Live 2022, and featured a Nintendo Live and Deep Cut-themed banner design.

The third QR code was released on 2022-11-30 to celebrate the beginning of Chill Season 2022.

Other games
On 2015-07-23, the Japanese Nintendo website posted nine QR codes for items in Animal Crossing: New Leaf that were based on Splatoon. The following year, on 2016-07-07, ten additional QR codes were posted with a focus on the Squid Sisters due to the then-upcoming Callie vs. Marie Splatfest.