Less NSFW Version
 
“In the distant future of 199horse, after a horrible accident and/or fit of boredom-induced body modification, Rainbow Dash got her body replaced.
 
Carbon-fibre skeleton, silicone mass and and shape filler and latex partial covering, graphite circuitry, no metal parts. Body material is flexible and elastic enough to fit some pretty large stuff inside without issue. Body circuitry connects with neural augmentations for fine control over perception sensitivity and strength limits, and can be plugged into USB. Chest-housed reactor generates energy and constructs repair and lubrication silicone from normal food plus silica supplements, Wings are some kind of voodoo.”