Is the r4 illegal

DS flashcards are illegal in some countries, the UK is one. In other countries it is legal as long as you use it for legal purposes such as homebrew software.

For example, there are about 800 different freeware / home brew games and applications that are available for you if you have the r4 ds from various places which categorize and list all of the freeware ds games. Not all of them are great games, but a good many are... but then the same can be said about games you get for the DS from Walmart - some rock, others...well...not so much.