The Cake Theory
"Baby Cakes," the latest episode for My Little Pony: Friendship is Magic, evolved our understanding of the Equestrian world in more ways than one. Now, thanks to pony genes, we're able to see how two Earth ponies can give birth to a Pegasus and Unicorn without any immediate relations to ether race. Answer: Recessive traits. Thank you 8th grade biology! However, there are some questions that still need answering. I personally have a theory that pertains to each Cake baby, so let's slice right in!
Now, we're all familiar with Twilight Sparkle's struggle to learn and advance in magic as a young filly. In the episode 23 of season 1 - "The Cutie Mark Chronicles" - where we see her struggle to even turn a page with magic. And that's with the enormous amount of studying she puts in. So why then is it so hard for Twilight Sparkle - Celestia's prime student and the Element of Magic - to learn what she needed to and got to where she was today, but a 1 month old baby can levitate things, herself, walk through walls, etc...?
Here's my theory on the matter. When we're babies, our minds are completely free from social and responsible implications. Because of this, our thought process is free reign and unrestrained. And, because magic is directly linked to the brain, it's my hunch that this unbound, young mind has no obstacles in her way mentally, allowing her to react magically on pure instinct. For, as we all saw in episode 23, it was a jump scare that allowed Twilight to hatch the egg and become Celestia's prime student. And so, once Pumpkin cake begins to grow up, that free thought will diminish, and she will have to start all over again, just like Twilight.
In short: Though it takes time and effort to hone and perfect magic, pure instinct proves to be much more powerful than focused thought, and young babies live solely off of their own instincts.
Leaving the subject of neurology, we move on now to physics. As it's been illustrated time and time again that Scootaloo, while using her ways in a very creative fashion, cannot (or will not) fly. However, again we are faced with a 1 month old Pegasus who not only flies, but does so without any instability or mistake. I have a couple of theories in mind for this one. Both can work either separately or together, depending on how far you want to go.
Theory 1 - Weight plays a huge factor between both Scootaloo and Pound Cake. While Pound clearly has smaller wings than Scoot, Pound has an advantage with his weight. While Scootaloo is equivalent to a 8 year old, and averages at about 57lbs, Pound's month old status leaves him at about 9. Because of that, his wings, as small as they are, would have less stress when he flies. So, like a humming bird, when his wings flap, he is easily lifted off the ground and into the air.
Theory 2 - This mainly pertains to Scootaloo. Again, going back to episode 23, we see Rainbow Dash easily winning a race between her peers. It is likely that here she is the same age as Scootaloo is now. So the reason why Scootaloo has yet to fly now is because of where she was raised and what she was exposed to. As she lived most her life in Ponyville, it's reasonable to assume that her parents are either ground flyers like Fluttershy or a different race entirely. So there is no one in her family to really teach her how to fly. This could also explain her admiration for Rainbow Dash. As proof that her exposure can lead to her skill, I go back yet again to episode 23, where we see that Fluttershy can barely take off from a cloud until she is dropped down to the ground. After she meets her animal friends, the change in scenery allows her to relax and float gracefully, as opposed to before, where she was so stressed she could barely fly a few inches.
In short: The fact that Pound Cake is substantially lighter than Scootaloo allows him to fly at a very young age. Also, Scootaloo's inability or rejection of flight can be most likely blamed on her upbringing.
Remember, these are only Fannon theories, and are subject to change as the seasons continue. Thank you for reading!