I would like to suggest a Young Frankenstein theme! I loved the 2018 Dracula theme, but as far as I know, YoWorld has never devoted an entire theme to the famous Dr. Frankenstein and his monster. Young Frankenstein is my favorite movie version of the story, but I would not be opposed to any version of the Frankenstein tale, modern or classic.
Type of House: Gothic Castle

Room Suggestions:
1) Grand Foyer

2) Laboratory


3) Library

4) Graveyard

5) Gothic Village

Vibe/Colour Scheme:
Black and white like the movie would be amazing! Otherwise, this theme requires rich, dark tones befitting a Gothic horror story. As for the vibe, I prefer Halloween themes that are more fun than scary.
Suggested Items:
NPCs of Victor Frankenstein, Igor, the creature, and his bride.
A crowd of angry villagers wielding pitchforks and torches.
The library should be massive with books stacked from stone floor to vaulted ceiling.
The laboratory should include a plethora of scientific gadgets and gizmos - the weirder the better! Body parts floating in jars are essential.
The Gothic castle furniture should be rich and substantial, but shabby. Dr. Frankenstein is too busy experimenting to keep a clean house!

Happy Halloween, YoWorld!
