I am not sure what exactly a .sps is are what you want it for. Reply with some info on what is and stuff and I may be able to help. In reply to GBC emulators for DS, yes there are. As far as I know Lameboy is a good GBC emulator and V0.11 is the latest version I know of. Go here for Lameboy V0.11 http://gbatemp.net/index.php?download=2246 Hope This Helps
An .sps is a Gameshark snapshot. It is the type of game save that people upload to GameFAQs. I would like to be able to use them on my M3.
I don't think you can, flashcarts are designed for action replay cheats. You do know that the majority of games come with cheats for the M3, right? Just the really new games without updates for the cheats don't have any. Edit: Whoops, guess you can, sorry, wasn't sure.
YES - you can - well you can change them to a .sav file which may then work on the M3 You need to use VBA (the emulator) First off you need to change the rom so it has the right settings. Ok, first go to Options > Emulator > and turn Flash 128K on instead of the usual Flash 64K. After doing that go to File > Import > Gameshark Snapshot...Then select the Gameshark Save. Now save ingame and the .sav file should appear right next to the rom automatically. Hopefully that helps.