Stick in Ridley, Medusa, K. Rool, Mewtwo, Black Shadow, Black Knight, and Claus, or Toon Zelda, Krystal, Ashley, Lip, Palutena, and Medusa, and players will be wondering where the hell Toad, Tingle, and Takamaru are. At some point you have to go by popularity and relevance, and the fact is that what gamers want, more than women for the sake of fanservice and feminist pandering, or villains for the sake of conflict, are X hero of X franchise, who is in all probability male. And there are quite a lot of franchises.