In Season 1, Episode 9 - Sam and Dean are going back to Lawrence and we're so here for it. Except for creepy basements and disturbing clapping monkeys. Our lore is all about Gef - the helpful mongoose poltergeist, aka the Dalby Spook.

Sources:

http://www.supernaturalwiki.com/1.09_Home

https://mysteriousuniverse.org/2016/08/the-bizarre-saga-of-gef-the-talking-mongoose/

https://www.mentalfloss.com/article/71816/strange-story-gef-talking-mongoose

https://www.themystica.com/gris-gris/

Ashford, Jenny The Unseen Hand 

Fraser, John Poltergeist! A New Investigation into Destructive Haunting

Knight, Nicholas Supernatural: The Official Companion Season 1