Quote Originally Posted by otakuryoga View Post
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except for the fact that she has repeatedly been shown to absolutely and completely idolize Dash and want to be just like her
....and that means FLYING
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I admit it is a little odd that we've never seen her fly, but I don't think it has to be because she can't. I can't see a reason why she shouldn't be able to fly. She's clearly not afraid of heights like Fluttershy or anything like that.

Have we seen other fillies/colts of her age flying, btw?

Also there might be other ways to be like Dash than to fly. What makes Dash special is not just her flight, but her coolness and awesomeness which you can be while doing other things, like racing on a scooter.