I bought 4 DS game carts in the past 2 weeks and spent a total of 240RMB($35).
ANA cart(YANJ) seems to be very rare, and I’m lucky to have gotten it

.
Suguroku DS(すぐろくDS, BK5J) is just a client and cannot be used..a lemon

..If anyone wants to research save file, I uploaded it.
I also uploaded the save file of the Wireless Distribution Box(AAFA) for research purposes.
The WDB carts in the photo is the same as the 'Nintendo Zone Wireless Distribution Box DS Card (World) (Rev 2) (Wi-Fi Kiosk)' rom, save file is 256KB.
(It seems that the save files are only used to record servers you want to connect to periodically, and even restoring a corrupted save has no effect, as it won't create a new save.)
Flashcart(e.g.AK2i) can run rom, save file is 512KB.
TWiLightMenu++27.5.0 can run rom, save file is 128KB.
TWiLightMenu++27.21.0 cannot run rom, white screen (recent version of TWiLightMenu++ cannot run).
Unlaunch cannot run rom, black screen.