City of Steel

Alligaticon

"The Alligaticon was created by the Constructicons from the remains of the disassembled Optimus Prime after he was captured by the Decepticons. The creature was let loose into the sewers beneath New York City which was being redecorated into New Cybertron. Scrapper noted that they made good use of Prime's remains.

In the sewers, the drone encountered the Autobots Ratchet, Hound, Mirage, and Bumblebee, who believed it to be a simple mindless beast. They tricked it into an abandoned train, where it got trapped and sent down the tracks. It was only later that they realized that Optimus Prime had been disassembled after encountering his head in the Decepticon base. Hound finally realized why his scanner kept picking up Prime when the Alligaticon attacked.

They sought the creature again in the sewers, where they struggled to capture it until Prime used his remote controls to bring the beast in line. After that, Ratchet used the parts to reassemble Optimus Prime at the expense of the poor Reptilicon Alligaticon."