Malonzo, together with Ramon Zamora gave rise to the so-called Pinoy Bruce Lee clones in the late 1970s.
He did also a string of martial arts films including Chaku Master in 1974, and They Call Him Bruce Lee in 1979.
In the 1980s, he became a director using his alternate name, Reginald King in his films, Pedrong Palaka (1980), Tigre ng Sierra Madre (1982), Roman Sebastian (1983), and Maestro Bandido (1983) among others.
In 1987, he starred with American actors David Anderson, Brett Baxter Clark, and Robert Patrick for the film Eye of the Eagle.
In 2000, Malonzo portrayed Andrés Bonifacio in the television film Pag-ibig sa Tinubuang Lupa, directed by Lorli Villanueva.