Robert Eggers’ Nosferatu retells the story of a horror icon for a modern audience, but the vampire was first encountered by many Millennials and Gen Z in an unlikely setting—Spongebob Squarepants.

When it comes to Halloween, some of us might say “I’m ready!” only to cower at the first sign of anything too spooky. That’s where friendlier Halloween-themed content comes in handy, and cartoons like ...