With the release of Virtual Boy on Nintendo Switch Online it seems there are no limits to systems Nintendo is willing to make available for modern hardware, even if custom hardware is required. The Nintendo DS is one of the best-selling systems of all time, and is successfully emulated elsewhere. When will Nintendo begin to make DS games available through the Nintendo Switch Online service?
When a DS app (along the lines of the existing console-specific apps) is launched on Switch and/or Switch 2 which allows playing DS titles, every open option will resolve YES. Otherwise every option will resolve NO at 00:01 UK time on the listed date.
Ports of DS games that do not meet the specific criteria of
A) being available as an inclusion with a NSO plan of any tier, and
B) playable through a console-specific app like the SNES app
will not cause any options to resolve YES.