In light of the recent 3DS hype, here are two QR codes Tyrone tweeted almost exactly a year ago. Scan them on your 3DS to see the magic. : r/bindingofisaac
Amazon.com: Datel Action Replay Cheat System (3DS/DSi XL/DSi/DS Lite) : Video Games
Deadline extended for redeeming 3DS and Wii U eShop codes
How to Scan QR Codes on a 3DS: 8 Steps (with Pictures) - wikiHow
Cars 2: The Video Game (DS, 3DS) (Found Spy Camera QR Codes) | Lost Media Archive | Fandom