Applejack as Mario? Fit's perfect! It's an great idea that she's bucking the barrels from Donkey Kong! Even the read apples she has as her cutie mark fit to Mario. So, Donkey Kong stands for Spike than, I guess. It's almost the same scenario like in S2E10. You really have a talent to foresee what will going on (or almost going on) in MLP: FiM in the future! That's already your third fanart I see that shows something like that. I almost believe now that you're really able to take a look into the future sometimes.
Yeah, I suppose.. I had it the other way around cuz I thought Rarity's prissy personality would better fit peach, but you have a point. But, no offense against flutteshy, I like fluttershy, but I don't think she's tough enough to be Samus; I could more easily see rainbow dash as samus- i she wasn't Fox.