...in my opinion, is New Legend of Shaolin, for both hilarity and the utter insanity of the battles, many of which include Jet Li's character and his 8ish-year-old son fighting together, with the son standing on the dad's shoulders. The movie even opens with a great scene where they fight together with the son as a baby, and Jet Li whips his son towards him like a yo-yo. It's got it all: the life-changing No Shadow Kick, bad-ass kid and women characters, funny dialogue, secret maps tattooed on kids' backs, a Poison Clan villain with a crazy magic metal chariot, and dudes that are so crazily puissant that they can run across swords flying through the air.
And good news for you: it's now on Netflix streaming!
Here's that opening scene, sadly without subtitles: