The Doctor zigzgged in between the crowd, and turned into an alleyway, dissapearing.
As much as he wanted to bring him with him, it was still to risky to get Prince to tag along yet.
But he had seen him. He knew he was there.
He had led him, without Prince knowing, to Ivy's house.
The spark that would start it all.
He activated the TARDIS and dissapeared, as it made the classic wirring noise.
...
That night, something incredible happened.
A number of ponies had claimed to have seen a blue box, similar to the ones on the posters, appear and dissapear all over the lower levels of Coltimore.
Others reported seeing an elusive brown stallion walking in secondary alleyways, and on further inspection, they recognized him as the 'Good Wizard' appearing in several ancient Equestrian fairy tales.
The Changelings also recognized the pony, but seemed afraid of revealing who he was.
The message was clear, though.
The revolution has started.