Hints - Seasoned Traveler

Click hints to reveal.

Hint to start puzzle: To solve the puzzle, you'll need to identify the episode every picture comes from, as well as who the final pony is. Make sure to double check your work. You can verify your reverse image searches by checking the MLP wiki's gallery for that episode.
Hint for extraction: Count Caesar wants us to shift the episode numbers by something, but what? Perhaps the feeder answers can provide some guidance. Don't forget the puzzle title.