1.) Twilight casts spell, cue Epic Transformation Scene! ...And Dash comes out as a BABY dragon, even smaller than Spike, because while she's a young adult by pony standards, she's a hatch-ling in dragon years.
2.) Essentially, a Godzilla-sized behemoth. Cue montage of Draco-Dash accidentally smashing various things, scaring tiny bystanders s**tless, and maybe even having to deal with another, REALLY big, male dragon, who has a crush on the "new, blue girl in town".
Gilda's face... How do I react to that... I mean really... There is no way to react to that face... At least for me. I don't know if I should be laughing or just in shock on how funny that face is. Good work