Wait? Nintendo DSi CAN PLAY Game Boy Advance Games?!

There was no Slot 2 Cartridge included in the package and I have tried inserting a regular GBA Cartridge, in case it needed some data from it,

From Nintendo DS Accessories - Scott The Woz

nintendo switch lite game card slot DS games It's the only medium used for distribution GBA or 'Slot-2' cartridge: This slot enables the console to play Game Boy Advance games natively and,

nintendo switch lite cartridge slot The NSMB hacking forum: everything about hacking and remaking the Nintendo DS game New Super Mario Bros And more!