Ratz is a French-Canadian animated comedy-adventure television series created by Richard Zielenkiewicz. The show stars two rats, Rapido and Razmo, aboard the S.S. Wanderer, a cheese-filled ship without an actual destination. The focus of the series is on the adventures of the two rats, including guarding the cheese, interacting with other stowaways and various ill-fated encounters with the crew. The rats themselves live in the hull of the ship in a lavish two-bedroom apartment.

The French version features the voices of the comedy duo Éric et Ramzy, while the English version features the voices of Terrence Scammell as Rapido and Rick Jones as Razmo. Unlike most animated programs designed for a younger audience, Ratz has (except for the episode "The Genie") no moral resolve at the end of each episode.

The series debuted on March 7, 2003 on Teletoon in Canada before premiering on France 3 in France on September 21, 2003. It has also been broadcast on various other channels overseas, such as Animania HD & Boomerang in the United States, Cartoon Network in Latin America, Hungama TV, Sony YAY! and Animax in India, MBC3 in the Arab World, K2 in Italy and Toon Disney in the United Kingdom.

The show premiered its episode, "Cheese Connection" on September 21, 2003, and the series finale episode, "Tomo the Sumo" aired on November 11, 2003. It can be streamed online since March 25, 2020 on Netflix, released in French first.Ratz was originally titled Rapido (in an unaired pilot) and featured a chunkier animation style. Also of interest is the pure blend of traditional animation and 3D animation, making it Canada's most expensive Teletoon show at the time, and the eclectic soundtrack by Hervé Lavandier.