Revolution for DS

The Revolution for DS (most known as R4DS or simply R4) is a series of flash cartridges for the Nintendo DS handheld system. It allows ROMs to be booted on the Nintendo DS handheld system from a microSD card. This allows the user to run homebrew applications, to store multiple games on a single memory card for convenience, to play games that have been backed up by the user, and most commonly, to play unlicensed games. It uses a microSD card for its firmware and games. The R4 flashcard's original developer stopped producing the R4 Card that plays ROMs for the Nintendo DS, however, there are a new line of R4 clones that have taken its place, notably the R4 3DS, R4 Gold, R4 DSi and R4 NES, which are used to play ROMs from various Nintendo platforms such as the Nintendo 3DS, Nintendo DSi, Nintendo DSi XL and Nintendo Entertainment System.

Original cards

There are original R4 cards created for the Nintendo DS and has been discontinued. The original Revolution for DS card is no longer available, but there are other cards that are of similar quality made by other entities that have adapted the name. The R4 3DS, however, is a genuine card, developed and manufactured by the same team that designed the original R4 DS cards.