Zelda II the Adventure of Link had a save feature. I thought Kirby's dreamland did as well. There were a number of games that had save files although of course

Zelda II the Adventure of Link had a save feature. I thought Kirby's dreamland did as well. There were a number of games that had save files although of course many did not include the needed hardware on their carts. FWIW, the SNES also had no storage, and saves were in the carts. Not until the N64 did Nintendo ship a device with fungible, non-cart storage.