Here's a quote from Edgar Wright regarding the movie, Riki-O:
?A lot of Eastern films have this "try anything" aspect to them. Think about the films of Stephen Chao, Tsui Hark, even Bollywood. Mixtures of comedy, romance, action and horror. "Riki-Oh" is incredible, it's this futuristic super-violent prison movie. It was made in Hong Kong, but it's a manga comic-book adaptation. Perhaps it's actual quality is debatable, but it's just an awesome film. It's just astonishing, so ridiculously violent. If they made it today maybe they'd be able to pull off some of the visuals a bit better, but I just love it. I showed it to the cast and crew of "Scott Pilgrim", and I've screened it with audiences, and they always go for it. I've gone past the point of thinking it's a so-bad-its-good film, it's just so entertaining in its silliness and goriness. I have this theory that the only bad films are dull films. And "Riki-Oh" is not dull. It's highly, highly eventful! It's not one of the greatest comic-book adaptations, but it's definitely one of the most entertaining.'
With the Stephen Chow name-check, I'm not positive his movies were an influence on Pilgrim. The "try anything" aspect of his films is absolutely why I love them, although I call it "fearless filmmaking".