Remember back when I was sketching the My Little Pony and Team Fortress mashup? Well, I didn't color in Berry Punch Demomare, but I do have this instead:
Spoiler"Go to the moon! And take your cheap suit with you!"
-Rarity, after dominating Blueblood.
For those of you who are wondering what weapons I tried to draw there, Rarity is using the Diamondback, and Blueblood is using the Big Earner. I tried to draw a rose on Blueblood's lapel, but it doesn't seem to work well w/o color.
Plus a quick and dirty sketch of the scene from Meet the Scout as a pony and a griffon:
Now it might not quite work for the Artist Training Ground, but... It's TF2, so it's worth a shot.