hello i have the same issue, i have a authentical ruby cartridge and i dumps the save file with Gba-link-cable-dumper on my wii, the first time i send it to pkhex it work but after that it gave me the "binary is not compatible with save file" message error, i hope somebody know how to fix this. thanks anyway
(ps: i tried wyth my leaf green cardmod but fail too)
POKEMON RUBY [AXVF01].sav
POKEMON LEAF [BPGF01].sav