Learning How to TRICK or TREAT

What? Nopony is too old for trick or treating... right?
I agree!
This drawing was made for the MLP Nightmare Night contests of:    

After having LOTS of busy days of school and a stye on my left eye, I tried my best and could finally finish this Nightmare Night drawing! You have no idea of how relieved I felt when I finished it...
I just wanted to draw Luna trying to fit even more on this very special pony event, trying to trick or treat with the fillies and get some candy.
I also wanted to play a bit with the costumes. Oh! and I agree with Dash; Derpy's costume is the creepiest one, for sure!

This is my first time participating in a DA contest, so I hope I can get some luck!

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UPDATE: Featured on Eqeustria Daily: www.equestriadaily.com/2013/10…

UPDATE 2: Seems that I got some luck on the contest! Thanks sooo much for the prize, you guys! I'm dancing of happiness!
You can look at the winner results here: mlp-fim-union.deviantart.com/j…

UPDATE 3: Submitted on Derpibooru: derpibooru.org/458104?scope=sc…

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MLP FiM belongs to Lauren Faust and Hasbro.