This is my third vector trace package. This one was going to be bigger, but it was getting messy so I stopped here and will make other sets for wings, eyes, etc.
This download package (download on the right) includes the original Illustrator file where you can turn on or off layers for three different eye positions (normal, "happy eyes", and closed eyes). There are MANY mouth positions that you can just drag on the model to change their mouths to happy, sad, or various word positions.
For people without Illlustator, I included a Photoshop verison with all the ponies and pieces floating in a layer over a dark grey background. For people with neither, I also included a large PNG file with a grey background so you can easily cut the model out and move it somewhere else (I find it's far easier to cut something out over a dark grey background cleanly that something like white).
More will come, but I hope this is a help to everyone doing art!
Here are the others I've done: