The Sibling Rivalries of Scott and Penelope

The Sibling Rivalries of Scott and Penelope is a series of fanfics written by n5d25d90 based on the series The Grim Adventures of Billy and Mandy. The fanfics center on Billy and Mandy's children, Scott Booger (because nobody cares about middle names anymore) and Penelope Milkshakes (after Billy's old cat) and their adventures. Scott takes after his mom, although he is not as grumpy, unless you call him "Scotty". Penelope takes after her dad, with a big nose and a very low IQ. The series started with "The Grim Wedding of Billy and Mandy".

Tropes

 * Berserk Button: Don't ever call Scott "Scotty". You will not remain uninjured long.
 * Fail O'Suckyname: Scott's and Penelope's middle names.