The new eclipse pets got me thinking, I wish there was a way to search for themed groups in the advanced search.
For example: all the solar eclipse pets, Tyrielle's minion pets, all elemental Rikkis, etc.
It would be really cool to be able to tell how many there are, what the average sale price is (across all species), a compare pets across species or specific themes. You could even expand this idea into themed that were released during a certain year or fest/event.