A dragon and a pony have nothing in common.
One is a ferocious, gigantic and egoistic war machine that will take whatever it may want, will fight for it, destroy anything in its path and do everything it takes to prevail in the end, even and especially if it means being the last one standing.
The other is a peaceful creature whose greatest strenght lies in its peers, as each pony has its place in society, and only together they can accomplish their greatest feats.
Things were simple, things were obvious and everyone was very happy that way.

And then Spike happened, and with him the question of how really different a dragon and a pony can be…

Oh come on… who am I kidding? This is merely just another misadventure that began with Spike trying to cook something.