It was a single line on a dead retro forum: “r4 revolution for ds ndsl nds firmware 118 new – kernel rebuild. It works.”

: Firmware 1.18 provided a basic graphical user interface (GUI) with three primary icons: "Game," "Media" (integrated with Moonshell for music and videos), and "Slot-2" (for booting GBA games or accessories). Modern Alternatives

In 2009, Nintendo released firmware 1.18 for the NDS, NDSL, and NDSi. This update was primarily aimed at improving the stability and security of the console. However, it also introduced new restrictions on the use of flash cartridges like the R4 Revolution.