It's a savetype...
Datel has a built in .dst to .duc converter in his piece of software for the Action Replay.
What you need is :
Datel's Action Replay MAX - DS / GBA Software :
http://uk.codejunkies.com/downloads/...COMPRESSED.exe
outphase G6 Save Converter :
http://forums.maxconsole.net/showthread.php?t=26252
How to proceed :
Launch Nintendo DS - GBA Max Drive.
Go to Maxdrive DS (DS) > manage and swap save > online community server.
Then load your .dst file from gamefaqs in the application using the Open ("Load a file in the PC database") button.
Just convert now the savegame into .duc using the decompress button ("Decompresses and exports the selected save file").
Final uses the G6 Save Converter made by outphase to convert the .duc into a M3/G6 usable format (.0 .1 .2 or .sav).
I have tested the process with
http://db.gamefaqs.com/portable/ds/s...mario_bros.dst and my M3. Everything ok.
Googled .dst to .sav in i found this. Hope it helps.
Thanks for the help!
Just one thing.. The Datel Download link is broken...