hmm i would switch the bodyshapes reasons i have alwats imagined Rarity to be the one with big beasts and fluttershy to either cover them up more or have nomral sized breasts, and yes i know anime logic that i don't understand yadadada.
A Girl like myself will often use her breasts in a bold, sassy way to attract the attention of Boys she likes. Thus, it is all but antithesis that Fluttershy has such huge breasts but lacks the courage to show them off as other girls often do. THAT'S why its funny...
The only thing I don't like here is how Rarity looks. It could just be me but her hips seem too large for the rest of her figure. And I don't think she would have H-Cup breasts, but ones a little bigger like... like how you portray Octavia.
I really enjoy seeing rainbow dash with big breasts, she would have a better body shape! Fluttershy yes but if artists draw her with big breasts and not for rainbow, IT'S SO ANNOYING sorry if you get bothered..I Know you'll say athletic ponies shouldn't have big breasts Yadi yadi lalalala <_< </3 but still!
You know in one of :iconsheperd0821: comics he explains why he thinks RD would have smaller breasts. In case you're too lazy to read it the reason is because when Rainbow flies at her speeds having smaller breasts gives her more speed and aerodynamics than if she had a bigger pair.
I saw it , and I aslo saw fluttershy's reason DONT CALL ME LAZY YOU PIECE OF CRACKERS AND SWEET STRAWBERIES xD Lol well I believe that rd has the big breasts since she acts like Calhoun from wreck it Ralph and also dreams to be a captain like Spitfire ! DONT GET MY HOPES DOWN CAUSE RD IS BEST PONY OK!