R4 DS / R4 SDHC
R4 DS is the world first and one of the most popular DS R4 cards for DS game backup.It support max.2GB microsd card.R4 SDHC is the develop version of R4 DS which extend the ability to support the TF card from 2GB to 32GB. Both R4 DS and R4 SDHC support NDS,NDS XL,NDS LL console, they are very easy to set up with their own kernel and no need any update.
R4i SDHC / R4i Gold
R4i SDHC V1.4.5 is the latest R4i SDHC version which work with NDSI,NDSi XL,NDSi LL all versions ,it use their own kernel and keep patch updating to support the latested firmware. R4i Gold also support the latest version of NDSI,NDSi XL,NDSi LL , it use wood kernel and the patch keep updating to support any new version.Sure both of them support NDS,NDS XL,NDSLL.
There are kinds of R4i 3DS cards, now the most popular flashcards are:R4i SDHC 3DS and R4i Gold 3DS. Both of them Support the latest version 3DS console for playing NDS games, no 3DS Roms supported.The kernel and patch are keep updating to work with the latest 3DS firmware. These R4i 3DS card can work with all consoles(NDS,NDSI 3DS,2DS serise) for playing DS games.
Gateway 3DS is the world first flashcard for playing 3DS roms,it can play NDS games as well because it came out with two cards-Blue one and red one. Uses need to set up Gateway 3DS with the 3DS/2DS consoles and write the 3DS Roms into the microsd card before playing 3DS Roms. Now Gateway 3DS can be used on any 3DS console for latest version and it keep files updating to upgrade.
SKY3DS / SKY3DS+
SKY3DS can be used in the latest 3DS console for playing 3DS Roms, It is very easy to set up, all set up steps can be finished on a PC, it avoid any demage for flashcard setting. SKY3DS+ is the upgrade version of SKY3DS which no need to write 3DS Roms but just copy the Roms into microsd card.It’s very easy to set up, but both SKY3DS and SKY3DS+ just can play 3DS Roms, no DS games supported.
Supercard DSTWO Plus
Supercard DSTWO Plus is the new development from Suercard team
Which allow users to play 3DS Roms, NDS games,GBA,SFC with only one flashcard.The tecnology is from Gateway 3DS for playing 3DS Roms,the set up steps are similar with gateway 3DS.If users want to play NDS,GBA,SFC, then it will be much easier to set up.
Supercard dstwo plus support the latest 3DS firmware with all version and keep the patch updating.