Poh waai ji wong (1994)

Ho Kam-An is a love struck dim-sum delivery boy who falls for a beautiful judo student. After being humiliated by her boyfriend, Ho Kam-An goes out and seeks the services of an aging kung-fu master who teaches him a half ass style of kung fu "Karate Kid" style. After actually learning how to fight using this style (much to the master's surprise) he dresses up like Garfield and beats up the boyfriend of the beautiful judo student. But he's challenged to a fight by the master's former foe. Is Ho Kam-An up to the challenge?