Question: The Off-Beats is a series of short animations that was created by Mo Willems, best known for which Cartoon Network television series, which American animated television series created by Mo Willems for Cartoon Network, and the 9th of the network's Cartoon Cartoons?
Context: The Problem Solverz is an American animated television series that aired on Cartoon Network.  Created by Ben Jones, it follows Alfe, Horace, and Roba, a group of detectives in their troubled town, Farboro.  The aforementioned characters were designed while Jones attended college in the 1990s; he later founded the art collective Paper Rad with Jessica and Jacob Ciocci.  The characters were featured in Jones' and the collective's animations and comics before the creator pitched a pilot to Adult Swim featuring the trio.  The network's executives referred Jones to Cartoon Network, who commissioned a series featuring the same characters.  The series was produced in Adobe Flash, with around fifteen animators employed at Cartoon Network Studios and the co-production of Mirari Films. Sheep in the Big City is an American animated television series created by Mo Willems for Cartoon Network, and the 9th of the network's Cartoon Cartoons.  The series' pilot first premiered as part of Cartoon Network's "Cartoon Cartoon Summer" on August 18, 2000. The Grim Adventures of Billy & Mandy (also known as Billy & Mandy) is an American animated television series created by Maxwell Atoms for Cartoon Network, and is the 14th of the network's Cartoon Cartoons (albeit on when it was part of "Grim & Evil", due to the "Cartoon Cartoons" brand being temporarily discontinued earlier in June 2003; the show itself is considered by some to still be a "Cartoon Cartoon" show regardless).  It follows two children named Billy—a slow-witted boy—and Mandy—the cynical best friend—who, after winning a limbo game to save Billy's pet hamster, gain the mighty Grim Reaper as their best friend in eternal servitude and slavery. Codename: Kids Next Door, commonly abbreviated to Kids Next Door or KND, is an American animated television series created by Tom Warburton for Cartoon Network, and the 13th of the network's "Cartoon Cartoons".  The series centers on the adventures of five children who operate from a high-tech tree house, fighting against adult and teen villains with advanced 2×4 technology.  Using their codenames (Numbuh 1, Numbuh 2, Numbuh 3, Numbuh 4, and Numbuh 5), they are Sector V, part of a global organization called the Kids Next Door. "Clarence" is an American animated television series created by Skyler Page for Cartoon Network.  Page, a former Cartoon Network storyboard artist for the series "Adventure Time" and storyboard revisionist for "Secret Mountain Fort Awesome", developed the series at Cartoon Network Studios in 2012 as part of their animated short development initiative.  The series revolves around a young boy named Clarence, who is optimistic about everything.  The network initially commissioned twelve 15-minute episodes, and aired the pilot following the 2014 "Hall of Game Awards" show on February 17, 2014. I Am Weasel is an American animated television series created by David Feiss for Cartoon Network, being the fourth of the network's Cartoon Cartoons.  The series centers on I.M. Weasel, a smart, beloved and highly successful weasel, and I.R. Baboon, an unsuccessful and unintelligent baboon who is jealous of Weasel's success and constantly tries to upstage him. Whatever Happened to... Robot Jones?  (usually shortened to Robot Jones) is an American animated television series created by Greg Miller for Cartoon Network, and the 12th of the network's Cartoon Cartoons.  The show centers on Robot Jones, a robotic child attending a suburban middle school. Evil Con Carne is an American animated series/spin-off of "Grim & Evil" and sister show of "The Grim Adventures of Billy & Mandy", created by Maxwell Atoms.  The series first appeared on Cartoon Network during the show "Grim & Evil", along with "The Grim Adventures of Billy & Mandy".  The two series later became separate programs in 2003.  While "The Grim Adventures of Billy & Mandy" runs for six seasons, "Evil Con Carne" only runs fourteen episodes and ended on October 22, 2004.  It was also part of Cartoon Network's series, "Cartoon Cartoons", and is the 15th and final cartoon of the series (albeit on when it was part of "Grim & Evil", due to the "Cartoon Cartoons" brand was temporary discontinued earlier in June 2003; the show itself is considered by some to be a "Cartoon Cartoon" regardless).  An official series finale, titled "Company Halt", aired on March 16, 2007. The Off-Beats is a series of short animations that was created by Mo Willems, best known for the Cartoon Network television series "Sheep in the Big City").  The first episodes were produced as stand-alone short films for Nickelodeon; but after the series was nominated for a CableACE Award, more segments were produced for KaBlam!  The series was initially called "The Misfits", but Nickelodeon had Mo Willems change the series' title (and re-animate the intro) at the very last moment before it its broadcast debut.  The series was the first to end on KaBlam!  after Mo Willems moved to the Cartoon Network to work on "Sheep in the Big City"; it too was canceled after two years on the air. Grim & Evil is an American animated television series created by Maxwell Atoms for Cartoon Network, and the 11th of the network's Cartoon Cartoons.  It consisted of two segments which were eventually spun off into their own series, "The Grim Adventures of Billy & Mandy" and "Evil Con Carne".
Answer: Sheep in the Big City