With the addition of the Magic Pet Mirror in the upcoming 6.2 patch, the Look-a-Like Challenge series is done for.
The new toy will allow you to look like any of your (combat) pets, making the search and need for NPCs that look like pets unnecessary. I'm excited for the Pet Mirror in 6.2, but at the same time I'm a little sad to see this project come to an end.
It was a fun challenge and I thoroughly enjoyed the hunt for NPCs to turn into. Some of them required a lot of brainstorming and testing.
Thank you to everyone that provided helpful information on different pet look-a-likes, and thank you to my OH for assisting with the tougher costumes.
I look forward to doing a new, similar challenge/project, whatever that might be! (Any ideas/suggestions are welcome :D)