We gotta talk about those wings of hers. She was born a unicorn, but after completing an ancient spell about, what else, friendship, she transformed into an Alicorn, a mix between a unicorn and a Pegasus, and a chance to sell just a whole ton more merchandise.
It's a good thing, too. Alicorn magic is leagues more powerful than a plain unicorn's, and Twilight needed the extra boost to defend Equestria as its newest princess.
Like when she fought that Tirek guy.
After Tirek ...