[Kong]

The answer is, we don't.
From the rules - Retro Uprising - FAQ

If a game supports SRAM, also called Battery Saves, Cart Saves or In-Game Saves, (example most RPGs such as Zelda) then you may use them. This is different than Save States. To create a Cart Save you must first use the game's original built in save feature and then close the game by pressing Escape followed Enter. To load the game just start it normally and then use the original game's built in continue feature. This rule is primarily to allow mastering of long RPGs. We will be less strict with the above rules in games that have SRAM enabled. If you have questions about a specific game, feel free to ask.