The Grim Adventures of Billy & Mandy/Milo Murphy’s Law

Grim as Milo

Gladys as Melissa

Harold as Zack

Mandy as Isabella

Boogey-Man as Mr. Mulcher

Billy as Phineas

Perry as Himself

Cavendish as Himself

Other Characters of Milo Murphy’s Law as Themselves

Other Characters of Phineas and Ferb as Themselves

Other Characters of Billy and Mandy as Themselves