I just felt like drawing someone in their Rainbow Power form. I did kind of like Twilight’s and Pinkie’s appearence, but I was a bit more mixed on the others -I didn’t think the colors worked very well, and I thought some of their manes looked a bit… silly. So I decided to draw Twilight, rather than try and re-design the ones I didn’t like. Even then, I couldn’t help myself and changed some stuff, particularly the wings, hooves and horn. And various other markings. Hmm, maybe I didn’t like the original as much as I thought? Or I just like to put my own touch on things. Like, the original design was fine, nothing wrong with it, but I thought some things could look better (Well, in my opinion of what “better” looks like), so I altered it to be more appealing to me
 
Either way, have a Rainbow Powered Twilight Sparkle, ready to shoot a rainbow laser of doom at someone.