I was always partial to Owen Wilson's sidekick character in
Shanghai Noon. (Wasn't wowed by Wilson in "I Spy" and haven't seen him in much else, including the sequel, though.) I thought he was a good complement for Jackie Chan, and I thought they had good chemistry.
Also liked Chris Tucker in both
Rush Hour movies, again, because he was a good complement for Chan, funny in the ways that Chan is not.
(And as a side note, let me just mention my
worst recent sidekick thoughts, which include "That annoying nervous British guy from
The Medallion, who would have made the movie unwatchable had Claire Forlani not occasionally walked by and smiled at the camera", and Jennifer Love-Hewitt in
The Tuxedo, who was just dreadful -- and I mean that as a slam on the writers, not on her as an actress or as somebody who can look good in a low-cut evening gown.)
So there's my Jackie-Chan-specific sidekick list.
