If these are from the GBA version, they should only go on the GBA version's page. Even though the rest of the sprites are the same, recolouring these to match the SNES version and submit them as if they are in the that version is straight up incorrect. I can see where you're coming from, but sprites should only be submitted to a game if they are in that game; it's really just as simple as that.
Now if the colours are just wrong in general, the best I can suggest is using VBA. It's generally the best GBA emulator and you shouldn't have to do any finicky business to get the colours right.
If you just want to recolour them to match the SNES version for yourself (and not to submit), then you'll probably have to do it manually in a tool like GIMP. Just use colour select to replace each colour with the matching one from the SNES version.
Now if the colours are just wrong in general, the best I can suggest is using VBA. It's generally the best GBA emulator and you shouldn't have to do any finicky business to get the colours right.
If you just want to recolour them to match the SNES version for yourself (and not to submit), then you'll probably have to do it manually in a tool like GIMP. Just use colour select to replace each colour with the matching one from the SNES version.