The original design for My Little Pin Up Rainbow Dash- an the final version below for comparison. This version was scrapped for a few reasons, both physically (Head was too small in comparison with the other designs, weird square bit at the end of the wing, which was too large for a normal pegasus pony-humanisation) and design wise (Heels seemed out of character for Dashy, cloud pasties looked a little… sus…)

I found it recently when cleaning up and organising my art archives :)