>>27566266Infernape evolves from Combusken, which has a design closer to feminine and then becomes taller with long hair, longer legs, and other changes, which is just to say, I genuinely don't believe they designed it at all to evoke anything near masculinity, just kicks, including at the combusken evo. It's all about the legs from a kicking standpoint.
As for the marketing of the other ones, I really can't say much. I haven't watched the anime in a long time.
Also, forgot about Chesnaught. It's pretty masculine as well because of the beard.