The existence of toys that never saw release, is one of the most-interesting aspects of collecting.
Here are two such Transformers. Intended as a new sub-section of the Pretenders line, these two "Deluxe Double Pretender" shells were designed to house two inner robots.
Whether these two pieces were the entire line of "Deluxe Double Pretenders", or just part of it is unknown. It is thought that the gorilla was to be an Autobot, and the monster to be a Decepticon.
Originally displayed at BotCon 1996, these solid resin mock-up hardcopies are some of the most famous and interesting Transformers never to have been released.