well keep in mind you will just need the tools, since i assume most of the text you would be able to rework from the ds game, back into the gba one.
maybe there are some extra bits, but having extra text you might have to cut down is better than missing parts i think
why do you want to retranslate it?
and, i'm not that interesting in this project, just interested 'about' the project
i'm happy to play the ds/3ds versions.
maybe the text is not the hard to play with, the other thread about translating game 3 should have enough information i guess? i didn't really look.