>>19154377The only real mysteries are male only Pokemon with no female counterpart; the Hitmon line, Braviary line, and Sawk and Throh. Things like Tauros you could just assume are male Miltank.
Female only Pokemon have the benefit of egg groups, plus several real life animals are all female. Aphids for example are all born pregnant, and every few generations some male eggs are produced, which then impregnate their sisters and die before the brood is even out of the mother.
