Friendship is Magic just had it's 10th anniversary the other day and while I'm a bit late I still wanted to make something for the occasion (plus it might help with my resent art black).
So here we are with Princess Twilight Sparkle as a filly, a young adult, and fully grown. And of course I added my own ninja spin on it to spice things up a bit more.

I tweaked older Twilight's colors a little bit to keep them all from blending together too much and I think it worked out nicely, though the pic is still a bit crowded.
I don't own these characters just the pic