Tofallids were a species of humanoid beings characterized by their extended necks. The droid maker Serv-O-Droid, Inc. designed the physical structure of the protocol droid PZ-4CO to have a similar appearance to Tofallids.
The reference book Star Wars: The Force Awakens: The Visual Dictionary, penned by Pablo Hidalgo, and PZ-4CO's entry on the Databank section of StarWars.com both mentioned Tofallids for the first time concurrently. These were both made available on December 18, 2015.
- Star Wars: The Force Awakens: The Visual Dictionary (First mentioned, simultaneous with PZ-4CO (Peazy-Fourseeo) in the Databank (backup link))
- Star Wars Character Encyclopedia: Updated and Expanded
- Ultimate Star Wars, New Edition
- Star Wars Day-at-a-Time Calendar 2021
- Star Wars Day-at-a-Time Calendar 2023
- Star Wars Encyclopedia: The Comprehensive Guide to the Star Wars Galaxy
- PZ-4CO (Peazy-Fourseeo) in the Databank (backup link)