You're new to this fandom, aren't you?
We must speculate!

audible gasp

Finally, the epic rival confrontation we've been wanting! Now, Twilight faces her Gary Oak, and decides the fate of the world.

Or it could just be a mistake… it's using those generic as hell pony pictures that you see in waaaaaaay too much of the merchandise to take too seriously. Honestly, that damn Rainbow Dash is the bane of my existence.