Yes, I am fully aware of Sawk and other all-male or all-female Pokemon. As I said, Pokemon are a single species. A species is defined basically as a grouping of creatures who can produce fertile offspring together, which is true of Pokemon as shown here. Sawk can breed with other Pokemon as long as it's not the same gender (therefore not other Sawk), so they can still breed.
Ah, nice to see someone else who avoids ROMs.
You should still find a way to play Parasite Eve though.
Maybe get a cheap used PS1 or something.