Well yes you could have more than one save per game, but it would be entirely up to you to manage them as the game itself only recognises one save. By that I mean you could play the game for an hour and save (make sure it wrote to the HDD by reloading (not resetting) the game, or use NO$Zoomer's command to commit the save file) then exit and go to the battery folder and copy the save to a different folder like perhaps called "Me". Then delete the save in the battery folder and your brother can have a go play for an hour a repeat the same procedure as before but this time copy it to a folder called "Brother". Then it would be up to you when you get back onto the system to copy your save located in the "Me" folder you made earlier back to battery directory and then when you are done playing save it propperly again and move it back to the "Me" folder. And so on and so forth, basically it's nothing that the emulator can do, only something you can do.
However some games do feature seperate save slots so theoretically you could play a game and Save in the game's first slot and and then someone else could start an entirely new game and save in the second slot. So you would both be playing the game on the same save file but just using different slots....however this is only a theory...and in practice it may end up different for instance when starting a new game the game may decide to wipe the data present in it's save slots...not to mention very few games actually use multiple save slots.
As for linking, no, a DS game can't be linked to ANYTHING on no$gba or iDeaS or NeonDS. DeSmuME is a little better in this regard, but the only additonal feature it has is that a GBA game can be inserted into a DS game for instance to receive a sepecial item...and I am not sure how well that feature actually works.
So the short answer for linking is no.
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The Champ has retired but may his Legacy live on FOREVER !!!!
Get it right fools! The glass is HALF-EMPTY, not half-full!!!
!!! WARNING: Emulation requires a brain !!! WARNING: Emulation =/= Piracy !!!
Last edited by SCHUMI_4EVER; June 5th, 2009 at 22:31..