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But audiences seemed to warm up to the temperamental reptile, who three years later led other Earth-loving beasts in the intergalactic showdown, Destroy All Monsters, saving the planet from Ghidra, a three-headed space beast.

4. Billy the Kid vs. Dracula

John Carradine regarded 1966's Billy the Kid versus Dracula as the worst movie of his career, perhaps that's because he plays a blood-sucking count who's saddle-sore.

When Dracula travels back to the old West, he targets a beautiful ranch owner as his next victim, but her boyfriend happens to be the famed gunslinger. Pardner, this town isn't big enough for the both of them, especially when the Kid's gal ends up with strange bite marks on her neck.

"I haven't met a man yet that a bullet couldn't stop," says Billy, who quickly learns his adversary isn't a man, although he once was, many centuries ago.

This feature ran as a double feature with Jesse James Meets Frankenstein's Daughter. Let's just say they weren't fixed up on Match.com.

5. Dracula vs. Frankenstein

Hippies come under the spell of Dracula in what is widely considered one of the worst monster movies ever made. To get right to the point, Dracula tries to indoctrinate Frankenstein into the brotherhood of the bat but the fangs keep falling from his mouth. Drac wins, but isn't around long enough for the victory party.

Sadly, this 1971 film by Al Adamson marks the final screen appearance of Lon Chaney Jr., the only man to play Dracula, the Wolf Man, Frankenstein's Monster and the Mummy. Here, he's an ax-wielding henchman for the last of the Frankensteins, although his name is not Igor.

The film's promotional material boosts: "Yesterday they were cold and dead … Today they're hot and bothered!" Tomorrow, you'll be lucky to find them on Netflix.