Jules Winnfield and Vincent Vega -
Pulp Fiction
Shadow, Sassy, and Chance -
Homeward Bound: The Incredible Journey
Dale Denton, Saul Silver, and Red -
Pineapple Express
Seth, Evan and Fogell aka McLovin -
Superbad
John Spartan and Simon Phoenix -
Demolition Man
Rocky, Colt, and Tum Tum -
3 Ninjas
Jackie Chan - Pretty much any Chan movie since he basically plays himself.
Kham -
The Protector
Ting -
Ong Bak: The Thai Warrior
Dewey Finn -
School of Rock
More when I can think of 'em.