The entire Super Mario Advance series of games is now available on Nintendo Switch Online for Expansion Pack owners.
Today, Nintendo added Super Mario Advance, Super Mario World: Super Mario Advance 2, and Yoshi's Island: Super Mario Advance 3 to the service, with these games joining Super Mario Advance 4: Super Mario Bros 3, which was released in February. You need to be subscribed to the higher tier of Nintendo Switch Online in order to access the titles, as with all GBA games.
These updated versions of the original selection of NES and SNES Mario titles add sound effects to the games in addition to Multiplayer and, in the case of Super Mario Advance 4: Super Mario Bros 3, brand new levels that you unlock through using the GBA e-reader. For the re-release on the Nintendo Switch Online expansion pack, these levels were made playable without the use of an e-reader for the first time, allowing some players to finally experience the full breadth and scope of the game.