They should make an episode of Scootaloo and Rainbow Dash together, even though they aren't sisters. But I still have this weird feeling that the might be half sisters, or long lost sisters that have never met before.
I would understand this more if Scootaloo will be Dash's admirer in this drawing i just don't think an 8 year old filly would have a crush on a 18 (19???? i dunno XD ) year old mare XD but its really well drawn and colored so thats awesome!
Whatever 19 counts as adult XD and i bet they are not 23 i see from their personalities that they are a bit younger since they make those kid of maistakes that most 19 year olds make, example: "Read It And Weep"