I have a few other things I've done... They're not too great, but hopefully it'll give you a few ideas
Just incase you can't quite tell what I did (I was too lazy to dig up all the originals
Fire pony: Pretty self explanatory...
Orange Pegasus thing: I was lunging her, so I edited out the halter and line. Then, obviously, turned her orange and attempted to draw a horn and wings. Didn't turn out great, but considering it was my first attempt at both wings and an anicorn (Fancy word, right? I discovered this while I was looking up ways to make one, and apparently a unicorn's horn is called an anicorn! Learn something knew every day.) I don't think I did tooooo horribly.
Pwetty Pony!: This was taken when I was doing some ground work to cool her off after a ride, so she was still all sweaty and such. I edited out her green stains, and a scar she has on her neck, and also cleaned up the edges a little so she looks all pretty! She was also standing in a ring with really crappy fencing and no grass in the background, so I (not very well) took out the fence and tried to kinda sorta add grass.
Fancy Shmancy Words and Such: Also pretty self explanatory. I pulled the frame from a video, and then made me and Roxy in focus and did a few minor things with the quality. I'm still messing around with the word color, but I figured I'd save what I have right now so you get the general idea.
If you want to know how I did any of them, let me know :)