>>56342811I like the addition of sexual dimorphism in Pokemon makes them more organic, but OP pic responds more to simple anthropomorphism than true or justified dimorphism, for example for the Machamp species I could imagine larger and more colorful osteoderms in the males to court the females with duller colors or thinking that it is a reptilian species to make the females bigger since they require a larger size to generate a greater number of eggs.
Now if we wanted to have fun with fiction, they could invent that during the mating season Machamp secretes an oil from specialized glands and these are applied all over the body to improve the appearance of their muscles, so the females choose the brightest male and not necessarily the largest, the humans of the pokeworld observed and imitated this and thus bodybuilding was born in the pokeworld.
