What is a r4i?

A R4 is a flash cartage for the Nintendo DS used to play games, movies, music, and homebrew on the DS.

It is not illegal but has been cracked down on in some countries including Japan. The problem with the R4 is that it's like selling blank CD's - it's legal to own, but some people use them only to pirate games and illegally play games they haven't yet bought.

If you buy an R4 and just back up games you already own (so you don't need to take so many cards on holiday for example) this is completely legal.

France takes R4 DS legal but UK illegal, and users need both R4 DS and Game ROMs. The problem is that Game Developers and R4 Manufactures need to find the right way to bring more for customers.

There is a kind of Wood R4 Firmware for R4 DS, which written by Yellow Wood Goblin. And R4 DS users can download.