CUrious BONE Syndrome

ANOTHER EDIT: Turns out early Charmander art DID have spikes on its back, it's Bulbapedia-gallery official! Found in trivia here [link] and on art such as [link] . Big thanks to *Twarda8the8XanaX for cluing me in.

FIRST EDIT: WOW! Wasn't expecting so many responses! Here's some FAQ:

1) DO I REALLY BELIEVE THIS
Answer = Not really, just more than the Kangaskhan one

I think that the developers wanted a sob story to up the creepy/tragic atmosphere of Lavender town and so gave a Silence of the Lambs-esque backstory to one of their species.

2) IS THIS THE MOST LIKELY I COULD COME UP WITH?
Answer = No

This is the more fun and interesting one I could come up with. If I'd wanted hard-to-deny I'd have had the Cubone-Marowak species be into heirlooms so that the Cubone's mother's skull is one that belonged to her, not one that was scooped out from inside her head.

3) MAROWAK WAS ORIGINALLY GOING TO EVOLVE INTO KANGASKHAN
Answer = No

There's NO proof of this from developers. What IS true is that Kangaskhan was one of the first Pokémon to be programmed in and as a result Missingno can evolve into Kangaskhan. Missingno can ALSO evolve into Rhydon, however, and I hear no one claiming that's connected.

More on this here:
[link]

In all likelihood I think the developers would have said by now, at least in the Anime, if this was ever truly intended.

4) WHERE DID THAT CHARIZARD NEST STUFF COME FROM?
Answer = Okay, I made that up. I wanted a communal nest and Cubones as a frequent outcome because Cubones are by far the more common in comparison to Charmanders.

5) AM I COMPLETELY FLATTERED THAT SO MANY PEOPLE LIKE THIS THEORY?
Answer = Yes! Totally!

I thought I'd just get scolded for disagreeing with the oh-so-loved Kangaskhan one.

I guess at the very least I picked the right group to suggest this to, what's not Creepy Pasta-licious about a deformed, rejected and cannibalistic starter Pokémon?

Thank you very much for all the comments (including the curious/sceptical ones, feedback is feedback)!

...

And now back to the original description:

I really don't get the obsession over the Kangaskhan theory (see bottom right of pic for explanation on why). So here's an alternative!

Made worse by how I clearly can't draw Charmanders or Cubones! Heh...

Ah well. If I did a third theory it would be that Cubones start off as a bug Pokémon and that, upon hatching, their mums pass away (spider-style) and the young then eat the body. Yay!

Marrowak: Fits into this theory as some weirdos went on to decide Cubones were cute and encouraged these growth issues, eventually leading to a subspecies with a partial evolution (partial because getting a little taller hardly compares to growing horns/wings).

And if anyone has any reason to believe that baby-Kangaskhan-by-self sprite is OFFICIAL let me know?

...Blahblahblah. Whatever, enjoy.