Milo of the Overworld and Other Stories

Milo of the Overworld: The Movie is a 2015 Italian-French-German dark comedy urban fantasy animated movie based on the original comic book series created by Rodolfo Sonego and Alberto Sordi.

Plot
Milo, Phil and Jill were finishing their job of ruining the life of Pachato under the orders of Lucifer but when Milo, Phil and Jill found out that Billy has struck a deal with Mr. Panch to prove the existence of monsters, they must find a way to stop him and Mr. Panch before it's too late.