Gen 3 Migration tool for DS?

[FuriousYak]

Lets assume you have 2 Gen 3 GBA cartridges (for example: 1 Sapphire, 1 Emerald), and no GBA, however you happen to have a DS. Is there a cartridge that you can put into your DS, so you can put in your copy of Sapphire, pull out for example a Sandshrew, put it into said DS cartridge, then remove your Sapphire cartridge, and put in your Emerald Cartridge and put the Sandshrew into your Emerald cartridge? In other words a save editor that lets you migrate from one gen 3 game to another using a DS cartridge? If not then what would be a good language to code something like that myself? I am in this current situation and I want to move my Sandshrew from my sibling’s Sapphire to my Emerald.

[YoumuCiel0]

Get a DS flash cart and put this on it.

You'll be able to open both saves in pkhex and move whatever to either save.

[FuriousYak]

Thank you! This helps a ton!