Sorry, I just don't see it. Jake Long had nothing in common with Mulan except for both having an Asian protagonist.
Looking back on The Weekenders, I sometimes wonder why I stuck with it for as long as I did. It wasn't bad, mind you, but the shows' humor was very dialogue heavy. It was almost like watching a live action show, only animated. Interestingly, if The Weekenders had been a live action show, I probably wouldn't have looked at it twice. Generally, I prefer my cartoons to be more, well...cartoony. Yet, I still enjoyed the series. Not as much I did Pepper Ann, though. Pepper Ann came of as more a more innovative to me because it was one of the very few TV shows out there with a female protagonist who was more of a "awkward" girl, not a super model in training. Pepper Ann the character was kind of like female Napoleon Dynamite or a 12-year-old Liz Lemon. Also, unlike The Weekenders, PA's writers didn't hold back from having gags that could and would only work in a cartoon universe.