A special version of Metroid has been added to the Nintendo Entertainment System selection available to Switch Online subscribers. It starts you off at Ridley with all her equipment, in particular the Ice Beam upgrade, to prepare you for the battle with Ridley and the route through Tourian following after.

Also added was a special version of Dr. Mario, which starts you off at a rare scene after completing the game at level 20 at Hi speed.

Source: Nintendo