What is dsi r4?

DSi R4 is a device that allows users to play backup games on their Nintendo DSi consoles. It is a modification of the Nintendo DSi console, which allows users to bypass the console's security measures and load games from a microSD card. The device is essentially a flash cartridge that plugs into the DSi's game slot and contains a microSD card slot. Users can then load games onto the microSD card and play them on their console.

The device is popular amongst gamers who want to play games that are not commercially available, or who want to play games that they have already purchased without having to switch between multiple cartridges. It also allows users to run homebrew applications and emulators on their DSi console.

However, it is important to note that the use of DSi R4 or any similar device is illegal, as it violates copyright laws. Additionally, the use of such devices may damage the console and void its warranty. Therefore, it is recommended that users refrain from using such devices and instead purchase games legally.