This article is about the episode. For the titular monster, see Sludge Monster from the Earth's Core.
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The Sludge Monster from the Earth's Core (episode)

Scooby meets Sludge Monster

The Sludge Monster from the Earth's Core title card

A Pup Named Scooby-Doo
Episode # 102
US Air date September 17, 1988 (ABC)
Story by Tom Ruegger
Teleplay by Mary Jo Ludin
Previous episode

A Bicycle Built for Boo!

Next episode

The Schnook Who Took My Comic Book

The Sludge Monster from the Earth's Core is the second episode of the first season of A Pup Named Scooby-Doo.


The Coolsville bank is robbed, and the bank's janitor reports that he saw the Sludge Monster from the Earth's Core in the vault that was responsible for the theft. However, nobody believes him except for the Scooby-Doo Detective Agency who then proceed try to find the monster and solve the mystery. The monster is later seen wondering around Scooby's giant doghouse.


Insert details here.


Main characters:

Supporting characters:


Other characters:




  • Police cars
  • Police helicopter


Suspect Motive/reason
Mr. Williams As the janitor he had the best possibility to rob the bank because he has the keys.
Red Herring As always.


Culprit Motive/reason
Mr. Buckston as the Sludge Monster from the Earth's Core To rob the bank.


Don Messick Scooby-Doo
Casey Kasem Shaggy Rogers
Mr. Rogers
Christina Lange Velma Dinkley
Kellie Martin Daphne Blake
Carl Steven Freddie Jones
Scott Menville Red Herring
Bernard Erhard Mr. Buckston
Sludge Monster from the Earth's Core
Dorian Harewood Police chief


Song Credits Performed by
"He's Got His Eye on You" Credits Peformed by


  • This is the first of several episodes to have the gang solve mysteries at night while in their sleepwear.
  • Shaggy's real first name is revealed to be "Norville".


  • Disguises: Scooby and Shaggy as bank tellers.
  • Scooby Snacks bribe: 3 and a whole box, on two separate occasions.
  • Running gag: everyone (including the monster) has to wipe their feet on the doormat before entering Shaggy's house.

Animation mistakes and/or technical glitches

  • None known.

Inconsistencies/continuity errors and/or goofs/oddities

In other languages

Language Name Meaning
Greek Το Λασπο-τέρας από το Κέντρο της Γης The Sludge Monster from the Earth's Core
Polish Potwór Szlamowy z wnętrza Ziemi

Home media


Shaggy: It was, like, nighttime in Coolsville, and at my house it was time to share a little late night snack with my pal, a pup named Scooby-Doo.
Shaggy: (walks into the livingroom with a gigantic tub of popcorn) Like, care for some popcorn, Scoob?
Scooby: (excited) Reah, reah, reah, reah, reah, reah! (sucks the popcorn up like a vacuum)
Shaggy: (looks inside and tips the tub upside down to reveal one left) Like, you missed one Scoob.
Scooby: (sucks the last one up again like vacuum) No I didn't. (laughing) He, he, he, he, he.

Mr. Williams: Sorry I had to sneak up on you kids. I was just following the trail of the monster.
Mr. Buckston: Yes, and he would've taken the blame if it weren't for these pesky kids.
Shaggy: Like, yeah, and a pup named...
Scooby: Scooby-Dooby-Doo!

External links

  • TBA

Previous episode: Series: Next episode:
A Bicycle Built for Boo! A Pup Named Scooby-Doo
Season 1
The Schnook Who Took My Comic Book

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