Super Mario War is open source, not quite what you are looking for but it was ported to NDS once (great Wii port too) and might be a good start.
Least one that has already been ported to Nintendo consoles in the past.
A live map making system and classic mario style play could probably be adapted if ya really must, plus multiplayer local n network.
Though I'd be happy seeing the game ported to 3DS with local network multiplayer. xD
Maybe a zoom function and/or two player shared on one machine complicated sorta setup.
Bigger maps to make networked local multiplayer more worth it....
Eh I'm day dreaming, game deserves a port to 3DS though.
http://supermariowar.supersanctuary.net/
Least one that has already been ported to Nintendo consoles in the past.
A live map making system and classic mario style play could probably be adapted if ya really must, plus multiplayer local n network.
Though I'd be happy seeing the game ported to 3DS with local network multiplayer. xD
Maybe a zoom function and/or two player shared on one machine complicated sorta setup.
Bigger maps to make networked local multiplayer more worth it....
Eh I'm day dreaming, game deserves a port to 3DS though.
http://supermariowar.supersanctuary.net/