Curiosity "earns" his cutie mark for being such a Mars crusader, and perhaps he will be soon a pony with a bone.. another herbivore with useless teeth, the horror!
If you dislike MLP, don't worry. This is not a character design change, I'm just messing around >;-)
Cell shaded commission from CreativeCrystal
Link
AngelBlancoArts
Just too funny and adorable! XD