Plus one for hitting a relevant anniversary, but whither the other two?
http://www.nintendoworldreport.com/news/69210/donkey-kong-land-added-to-switch-online-game-boy-library
After three Expansion Pack updates in October, November has a solo game for the regular tier Switch Online libraries.
Donkey Kong Land (1995) is now available in the Game Boy library. The game is a bespoke Game Boy version of the original Donkey Kong Country, which is celebrating its 30th anniversary this week.
This represents the first basic tier update since a group of SNES games in September, and the first Game Boy library additions since the entire Mega Man series was added in June.