Short pony dream of a yellow submarine

I found myself on a shoreline as a pony (always neat, i even had to learn to walk that way in dreams..). There stood the mane 6, and Luna. We had some kind of long mission given to us of world-ending class. There was a golden submarine we got in and took off on our voyage. At some point someone got in Luna's face about her being evil before, and it was very upsetting but realistic. Alas that is about all there is. Very vivid. So yes, we all lived in a yellow submarine.