If its make in China. Or if your box of the R4 doesn't have any Japanese writing it is fake.
Not everything made in China is fake. And there are many producers of the R4.Chat with our AI personalities
The R4 cards don't excist anymore, Nintendo banned them from around the world. the R4's you can find now are fake and have even more chance to wreck your DS(i).
not for the original r4 but if you have the r4 ultra or r4 sdhc or some other r4s then yes
r4
These are the main disadvantages to the R4: * There will be no more updates; The official R4 team disappeared. * As a result, the R4 isn't being produced much, supply is running out. * The R4 does not support SDHC MicroSD cards (it supports up to 2GB)
R4 has released a firmware update. So just put the newer one on your r4 card and it will work.