Although the game is a Nintendo DS title, playing it on a 3DS (or New 3DS XL) offers several hardware-specific features that enhance the experience compared to the original DS hardware:
While specific QR codes from 2021 may no longer work due to server changes, current repositories like hShop provide updated QR codes for digital installation . How to Install Using QR Codes gta chinatown wars 3ds qr code 2021
Scanning a QR code to download a full commercial game (a ROM) falls under piracy. While forwarders are legal tools, the game’s data still requires a legitimate source. Although the game is a Nintendo DS title,
using QR codes, you must use a homebrew application like FBI to scan and install the game's installer file (CIA) from a remote source . using QR codes, you must use a homebrew
Retro Gaming Archives Topic: Nintendo 3DS Homebrew & QR Code Myths
If you find a .cia file for Chinatown Wars on your PC (from an archive or backup of your own physical cartridge), you can put the file on your SD card and install it via FBI's "SD Card" option. This is what the QR code automated for you back in 2021.