I recently bought a GBA SP at Value Village for $2.99 and it's in perfect working condition, so I've decided I would love a flash card that I can plug into it with the entire GameBoy, GameBoy Color, and GameBoy Advance library. Such a thig is possible at this point, right? I really hope my CycloDS Evolution hasn't spoiled me on my expectations for what a flash card can do, but I'm looking for a flash card that will meet the following criteria; - The cartridge itself must be the exact physical size of a regular GameBoy Advance cartridge. I do not want it sticking out or being one of those "fatter" cartridges that can damage the system due to being poorly molded. - To have enough memory to hold every GameBoy, GameBoy Color, and several (if not every) GameBoy Advance game. I really want an all-in-one master device. - Every game can save normally. I've heard a lot of flash cards can only let you save one game at a time, so if you play another game, your save data will be deleted in the other game. I do not want this. - The cartridge can't use a battery. I want a flash card that'll last me for as long as I take good care of it without having to open it up and change the battery every few months/years. - I don't need to patch every Game before being able to use it. I want to be able to just upload games to the flash card and be able to play them just fine. Things such as cheat codes or media capabilities (movie, music, etc) do not matter to me. I really hope you guys are able to help me here. It'll be a shame if I can't find a flash card that meets all of my criteria, but I might be able to make a compromise or two on the less important ones (cartridge physical size, for example, wouldn't be an issue as long as all four of the other things I want are possible). So far I've had my eye on the EZ-Flash IV but I heard even it had some problems. Thank you for your time!