Royal Quality Time

I've been watching too much ponies. Plus, these two are fun to draw! _{(the background came off the castle creator game)}

I haven't posted anything pony-related in a long while, so here ya go. Princess Celestia kicking Princess Luna's butt in some 3DS multi-player game. And now for some random dialogue:

What's wrong, sister? Losing your touch?
Shut thy mouth! Thou art lucky to still have thine skill in this!

What are they playing?

The answer: Super Smash Pony: Armageddon.

EDIT: My God, you guys! I posted this 12 hours and 24 minutes ago and already it's my second most popular! I understand you all love it, but can you at least have a peek at my other non-pony deviations? I know I say that an awful lot, but it's true!