Hmm... Part of me wants to believe these are fake. They just recently FF1 and 2 on the PSX, and they've already released them on another handheld system (the Wonderswan Color, though only in Japan). I've got the feeling that these are just screenshots from the WSC versions, with "GBA" 'shopped in. Especially since on of the monsters in the FF1 pic is just the Doom Train from FF6.

Care to give us a link to where you found this info?