I want to know if there is some way to obtain Mew in Pokemon Fire Red (Spanish version). I have the ROM emulated in my android phone (with My Boy Free). But there should be no difference between the real deal.
There is no known way of obtaining Mew within FireRed or LeafGreen, outside of messing with the save data / memory / ROM yourself (i.e., cheating/hacking) or getting it by trading (i.e., an event). There are no glitches that would enable a Mew encounter, either.