Nightmare Train

Cerberus The Nightmare Train is the main antagonist of The 2011 cartoon of The Little Engine That Could.

Appearance
The Nightmare Train is a Large scary creepy villainous Black anthropomorphic 6-4-0 tenderless steam tank 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 and A Scary name Ceberus.

Why He is a Villain?
Cerberus 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 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 Very much to Montana the Big Streamline Express Engine's Anger.

His undoing
Cerberus 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?
During the end credits we see Nightmare Train at the bottom of a ravine, probably having jumped the tracks because of little engine and her trick. He might as well appear in the Casey Jr and Friends TV Series.