George & Harold in The Loud House: The Batman/TMNT Adventure

George & Harold in The Loud House: The Batman/TMNT Adventure is a 2018 digitally-animated 2D action-comedy released by Warner Bros. Feature Animation and Nickelodeon Movies. The film is a four-way crossover between The Loud House, Teenage Mutant Ninja Turtles, Captain Underpants, and Batman: The Animated Series.