1) Why Princess Celestia is not a Queen? Who are the Queen and King!?
Because if there's one thing I've learned from games, movies and TV, it's that QUEENS ARE EVIL!
Hence, King Sombra and Queen Chrysalis What the buck is a Elsa?
2) What's beyond Equestria, is it a round planet just like Earth!?
Probably, there's places like Zebrica and Saddle Arabia in the world.
3) What would happen if a pony finds his her special talent but later in life she he realises she he doesn't want to do that anymore? Would his her cutie mark change!?
I do not know.
4) Why parasprites don't devore the Everfree forest!?
Because the Everfree would be like "Oh TARTARUS no!" and throw them out,
5) Why do ponies have a cutie mark? Who or how do they appear? Magic? I don't think so!
To distinguish their talent, when they find their talent (Pinkies pechant for parties as an example) and yeah probably magic.
6) What if a crystal pony has an accident and breaks a leg shall it shatter into pieces just like glass!?
I assume that they aren't actually made from glass.
7) What are ponies made of!?
After extensive testing, I've found ponies to have soft, wooly insides, almost like a plushie!
8) How was Equestria made!?
https://www.youtube.com/watch?v=77zjl0YceRc This will answer all of your questions!
9) Celestia and Lunas parents!?
I assume that they're orphans.
10) Why do Pegasus have to clear the skies? Isn't that supposed to be a nature issue?
The weather ponies need to do something!
11) Who was the first pony to exist?
Starswirl The Bearded, for he is Alpha and Omega, the beginning and the end.
12) Why there's no sea ponies?
Why are there no space ponies? :okiedokielokie: