Kirby Tilt ‘n’ Tumble, Mystery Tower, Harvest Moon, and Blaster Master: Enemy Below were just added to Nintendo Switch Online. These games are all part of the standard service, not the expanded. Last month we got the Super Mario Advance series for GameBoy Advance. GameBoy Advance games are part of the expanded service. It is a nice change of pace, with Nintendo offering something for the base service.
Nintendo announced the release in this video.