Mecha Mutt Menace is the fourth direct-to-DVD special based on Scooby-Doo, released on September 24, 2013 on the 13 Spooky Tales: Ruh-Roh Robot DVD.

[2] Fred has entered the Science Expo in Houston, Texas, with a monster trapping project involving magnets, a trampoline, and a sticky net.

The gang checks out her father's demonstration where he unveils a large robotic dog, "Mecha Mutt", equipped to travel over Mars terrain.

A spirit attached itself to the ship when it landed on Earth and now anytime something goes wrong at NASA, they blame the supposed specter.

Fred, Daphne, and Melanie talk to Lab Assistant Irv, who has a desk covered in food wrappers and sticky hands.

After a fight with missiles and rocket boosters, the two machines crash into a magnet-wielding crane and Mecha Mutt is destroyed.