The Grim Adventures of Billy & Mandy

The Grim Adventures of Billy & Mandy was an American animated television series that originally aired as a segment series on August 10, 2001 along with Evil Con Carne in the Grim & Evil block. the show officially aired as a series on June 13, 2003 and ended on November 11, 2007 with the finale The Grim Adventures of the Kids Next Door.

A film titled Underfist aired on October 31, 2008 and was originally intended to be the pilot of a planned spin-off to The Grim Adventures of Billy & Mandy, but due to Atoms contract expiring it was never made into a series.

Snafu Webcomics
Billy, Mandy, and Grim apppear in PowerPuff Girls Doujinshi and doing their normal scary activity with their new friends.

In Grim Tales, Mandy and Grim are married and have kids and this story focuses on the Grim family.