Well Dash, you see, Derpy doesn’t ditch the team the first time she gets an offer from another team.  
Also, she’s a far better pony.

Duh, Derpy is a billion times better than you, Rainbow Crash.

@PonyPon  
I say they know something.

Meanwhile, Soarin’s asking the same thing about you, Dash.

at least she’s not a dick

Either they couldn’t find anyone else, or they know something we don’t.

She is kind of your twin.

And… that’s a problem?

Oh no noooo… not replace
 
But you will have to share a room together and we get to watch the hijinx.