Spuži Kvadratnik

Spuži Kvadratnik is a character in the Never-Ending Story. He is SpongeBob's cousin from Slovenia, who works as a secret agent investigating paranormal activity. He has a good attention to detail and will point out anything unusual or possibly paranormal, even if it is barely noticeable to everyone else. He writes a blog about his findings.

He first appears in Chapter 3 Part 27, on the bus with everyone else. He first points out that a fire hammer is missing, then points out how everyone has supposedly gone back in time.

He later appears in Chapter 5 Part 4, after Woofsers Oofsers calls for his help. He also introduces Paavo Pesusieni, a robot created by one of his friends.