1)R4DS: Latest official firmware – 1.18 2008-04-24 Latest unofficial firmware by R4li – R4 v1.24 YSMenu Moonshell2 for R4 by FairyWings Moonlight V1.02 R4 Version

2)R4i Upgrade: YSMenu R4iUpgrade – Latest one I recommend to use YSMenu

3)R4i SDHC(Red Box): Latest Official Firmware – v1.11 YSMenu Latest Official Beta Firmware I recommend to use YSMenu

4)HyperR4i: Official Firmware –…

1)R4DS: Latest official firmware – 1.18 2008-04-24 Latest unofficial firmware by R4li – R4 v1.24 YSMenu Moonshell2 for R4 by FairyWings Moonlight V1.02 R4 Version

2)R4i Upgrade: YSMenu R4iUpgrade – Latest one I recommend to use YSMenu

3)R4i SDHC(Red Box): Latest Official Firmware – v1.11 YSMenu Latest Official Beta Firmware I recommend to use YSMenu

4)HyperR4i: Official Firmware – v1.54RC YSmenu(Not sure if you can use it though).

5)R4i RTS(M3 Team Made): Official Firmware – V2.2

6)Gold R4i( R4i Gold ): Official firmware- v1.30 | YSMenu

7)R4-III SDHC: Official Firmware – v3.07

8)R4i Ultra: Official Firmware-1.55 | YSmenu | AKAIO – 1.4.1

9)R4 Pro/R4i Pro: Official Firmware – v1.50 2008.11.05 Official Firmware for R4iPro – V1.27 YSMenu

10)R4SDHC/R4iSDHC: Official Firmware for R4SDHC – R4 SDHC v1.27 Official Firmware for R4iSDHC YSMenu

11)R4i: Official Firmware for R4i – R4i v1.30

Frankly speaking, you can play some basic games by using r4 clone. However it is very easy to get stuck on loading screen or brick your ds By using a R4 clone. Also it is impossible for R4 clone to play the newest games or work with over 4GB cards. Generally speaking, it is better for you…