Actually, you could in theory craft save-data that softlocks the game when the save-data names are displayed. If the game isn't programmed to wipe bad save data

Actually, you could in theory craft save-data that softlocks the game when the save-data names are displayed. If the game isn't programmed to wipe bad save data you'd be in trouble. Not saying this is the case for SMW, but there are certain cartridge games where this can happen naturally.