1) Finetuned the groundwork I use before drawing the outline. Made the 'skeleton' extra detailed for the purpose of this wip. Hope they actually help someone!

2) Rainbow and Rarity are fun to draw because they swing their hips the widest and most often. Even when they're idle or standing still. Rarity's dress means it's hard to tell with her in the end though.

3) Removed Rainbow's blush on the final product because she's not actually embarrassed or ashamed here.

4) She also had a pink shirt at first (Fluttershy's mane color scheme to be specific) but changed it to white because she looked better that way. Especially with the comic's background.

—

Drawn with pencils. Cleaned up with GIMP.

Complete version