Matinee Mandy (partially lost original English audio of "The Grim Adventures of Billy & Mandy" animated short; 2007)
From The Lost Media Wiki
Title card for the short
Status: Lost
In 2007, Cartoon Network released a short based off of The Grim Adventures of Billy & Mandy titled Matinee Mandy. It is unknown at what specific date the short was released or if it even aired on television in America at all.
Two versions of the short are known to exist online, both uploaded to YouTube, but neither in English. The first upload is in 4:3 and features both Chinese subtitles and Chinese voices. The second upload is in widescreen; it appears to be a recording from a Thai version of Boomerang and features Thai dubbing. It is unknown if the English version was even released or if any copies of it exist.