Well, a horrorbrew is a fan-created original character or scary story based on Nintendo properties—most commonly Super Mario—designed to look like a corrupted, haunted, or cursed video game element.

So, to put it more simply, it's basically an EXE but Mario

Yeah, I don't do requests

No

Yup

Y'know, I'm actually planning to do Widow, basically a retake of Forest King, so expect that on Day 8