Dr. Karl Frankenstein

Dr. Karl Frankenstein is a major antagonist in There and Back Again: A Pony's Tale by Rey. He is a mad scientist, Rey's best friend and Chauncey's owner, leader and boss. He is secretly one of The Supreme Leader Snoke's henchmen and Eddie's partner in-crime and sidekick. He is about to help Snoke kill Rey but fails when he falls to his death in the waterfall with Chauncey before he would kill the crocodiles.

Trivia

 * Tzekel-Kan shares similarities to other animated film villains:
 * Kent Mansley: They are nosy, paranoid, crave to exploit the heroes' identities, and get allied with an army leader (Supreme Leader Snoke and Eddie Ren to Karl, General Rogard to Mansley), only to have the latter turn on them. They also hold high positions within the government and seek to advance them.
 * Judge Claude Frollo: They are corrupt priests who use their positions to get rid of "wicked" people, and they're also insane. They are also very disrespectful towards their benevolent authority figures (Bernard, The Archdeacon). Unlike Frollo, however, Tzekel-Kan survives.
 * Jafar: They seek to overthrow their bosses (Bernard, The Sultan) and take over their respective kingdoms for themselves. They are revealed to be sorcerers and later use their magic to try to kill the protagonists after realizing they are not who they say they are. Unlike Tzekel-Kan, Jafar actually succeeds in the former (for awhile, at least).
 * Zigzag: They are sorcerers and Grand Viziers who eventually betray their superiors and ultimately allied with and became subservient to more dangerous villains (Karl: Eddie Ren, Zigzag: King Mighty One-Eye).
 * Kralahome: They are high priests who use magic and seek to take over the kingdom for themselves. They also have chubby, hapless henchmen at their disposal.
 * : They are high priests and advisors of their bosses (Bernard and