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Kung Fu Hustle is rated R, which was outside of the general range of ratings I went for. It's been a while since I watched it and I couldn't remember specifically what got it that rating.

Description from Common Sense Media:

Parents need to know that Kung Fu Hustle is a Hong Kong martial arts comedy starring Stephen Chow. It has lots of stylized and cartoonish violence and blood. Scenes show the aftermath of people dead from ax wounds (axes sticking out from bodies), gunned down by gunfire, and beaten up; bullying (kids beat up a boy and urinate on him); and people dying from fighting. A person is decapitated, and a cat is cut in half, but these are only shown in shadow. People are "comically" stabbed by knives, beaten up, threatened, and chased. One effeminate man is often called a "fairy" and made fun of. The movie also has fat jokes. A married man often flirts with other women, but this is part of an act. Characters range from naive romantics to hard-core hired killers, and the tone is wildly comic, often paying homage to previous martial arts films. The main character shows some positive values in his redemption story, eventually becoming compassionate and showing integrity. Adults drink alcohol and smoke cigarettes and cigars, and one man smokes opium out of a pipe. Strong language includes "f--k," "bulls--t," "a--hole," "ass," "bitch," "fairy," "damn," "hell," and "piss."

Seems definitely a bit more mature than Shaolin Soccer was, at least in my opinion.