Cerberus is the main antagonist of the 2011 remake of Watty Piper's The Little Engine that Could. Edit
The Nightmare Train is a large, scary, creepy, villainous, black anthropomorphic 0-6-4 tenderless steam locomotive with three smokestacks, pulling a train of three old rickety boxcars and finally one old rickety caboose. As soon as he had the toys and the real boy in his possession, his appearance changes into a more frightening form with his cowcatch forming his mouth and other bestial features like his whistle and pistons.
Why He is a Villain? Edit
The Nightmare train tricked Little Engine into giving her the Toys and Richard (the real boy) claiming he will take the group to the real world. But when they were in his boxcar he revealed his true form and left The Little Engine derailed. He intend to keep the real boy (Richard) and the toys in Dreamland to keep the tunnel closed and halt the delivery of good dreams so the only dreams that could be delivered were his nightmares.
His undoing Edit
The Nightmare Train was defeated by The Little Engine with help of Richard. They outwitted and switched him to another track and sent him barreling down the mountain at high speed.
Where is He now? Edit
During the end credits we see The Nightmare Train at the bottom of a ravine, probably having jumped the tracks because of The Little Engine and her trick. He was then presumably turned into scrap metal, meaning that he was killed.