Mini TroopAlso to use the DSi mode, you need a dump of the NAND (internal storage) and the arm7 and arm9 bios which you can easily dump with homebrew and if you don't have it, it is a couple minutes to install with flipnote lenny or memory pit. Don't use a video guide, use the official one at https://dsi.cfw.guide/ as that one is up to date. To dump the bios, firmware and if you haven't done so, the NAND refer to https://wiki.ds-homebrew.com/ds-index/ds-bios-firmware-dump and this requires unlaunch to run which is custom DSi firmware. The advantage of using your own dump is that you don't need to do any setup to install Flipnote Studio or anything because it is right to how it was on your DSi.