gameboy advance backup

[mushussu]

Hiya after some info on a couple of things,
- have 30 odd gameboay adv games (originals) 2gba adv and ds and three kids is their anyway i can backup the originals onto one or two bigger carts ,
so they dont have to sawp through all the carts every ten minutes and me having to find them all over the house
- also would it be illegal to then play those carts over link cable ?
- also in relation to gba adv movie players does anyone have any experiance with them good, bad whatever just pm me info so not to clutter forum if you like


thanks for your time