No it is illegal
Only if you own the actual licensed copy of the game.
Its not always illigal. If you use it for homebrew its legal and for backing up your games its also legal. r4ds is illegal because when you go and download roms off the computer and you don't even own the game it is like going to Target and stealing a Nintendo Ds game.
huh? the R4DS is for the Nintendo DS.
no, but there is no need to, the R4DS has a built in Action Replay.
Yes the r4ds boots up game boy games into ds mode.
the question is a bit vague: The best model for R4DS: The original R4DS (not pro, not ultra, not SDHC, not R4i etc.) The best kernel version: v1.18 (Released 24th April 2008) www.r4ds.cn
no
no it is not illegal
The official R4DS comes with a CD with everything you need on it. Unofficial ones do not come with a CD, so you will need to find out which website you need to go to for the downloads. You can check the website from any packaging your R4DS came with.
r4ds.cn
NO !!!!!!!!!!!!!!!
It will work if you decrypt the file, but it is easier to use the R4DS cheat editor: http://www.r4ds.cn/download/Cheat_code_editor.html