>>39577798>>39577998First there were only Kangaskhan, both gender. Team Rocket started hunting them down and shipping to safari zone of which they share profit (ever wonder why Giovanni has so many Pokemon from there and sell a few in Game Corner as prizes?). One Kangaskhan baby got away, was very weak so it came back to her mother and took her skull and bone. When it evolved the bones merged with it giving birth to Cubone - new born species that inherited crybaby character but does not actually lost mother. History goes as urban legend making into Pokedex. Now in Safari zone you can find only female Kangaskhan. It doesn't prevent them to breed, Pokemon always inherit species after mother after all, but male babies can't grow to full adults anymore.
>>39577826It's the baby you got from the egg. Day care couple just makes sure it have mother so they provide you adult form to take care of it.
>>39577833Incense cripple the fetus creating weaker baby form.