Smarten Up!
Series The Grim Adventures of Billy & Mandy
Season 1
Production code 106
Writer Gord Zajac
Broadcast information
Broadcast number 6A
Cartoon Network US Premiere July 18, 2003
Paired with The Crawling Niceness
The Grim Show
Chronological information
The Crawling Niceness
The Grim Show
Smarten Up! is the second segment of the sixth episode of The Grim Adventures of Billy & Mandy.


Billy isn't smart enough to take the test. So Grim gives him a Book Worm, which will make him much smarter, but Milkshakes, Billy's cat, eats the worm by mistake, so he must now tutor Billy while in control of Milkshakes' body, but Billy is impossible to teach. 


  • Story by: Gord Zajac
  • Storyboard by: David Feiss
  • Directed by: John McIntyre, Robert Alvarez


  • Billy seems to want clowns to be on the train in Book Worm's hypothetical math question, despite Billy's later revealed fear of clowns.


Bookworm jar
The image gallery for Smarten Up! may be viewed here.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.