Angry CatDog

Angry CatDog is a 2020  American animated television film based on the two Nickelodeon series The Angry Beavers and CatDog, each created by Mitch Schauer and Peter Hannan, making it the second crossover in Nickelodeon animation. The movie serves as being a series finale for both shows, as it is loosely based off of an unfinished Angry Beavers episode, "Bye Bye Beavers".

Summary
After both  Wayouttatown, Oregon and Nearburg both get mixed together by an unknown force, the conjoined brothers Cat and Dog, and the buck toothed separated brothers Norbert and Daggett are forced to work together in order to travel back in time and fix the whole mess, with a time machine provided by Scientist #1 and Rancid Rabbit.