Shanker has done more than 20 films as hero in Tamil language.
Shanker appeared in an uncredited role in the Malayalam language film Sarapanjaram (1979).
Shanker's debut release as hero, Oru Thalai Raagam, the Tamil film completed 365 days run in several theaters.
Galatta Cinema, a Tamil film magazine described Shanker as the True romantic hero of Mollywood in their special edition on 100 years of Indian cinema.
Shanker ruled Malayalam films as Superstar till mid 80's.
Shanker gave break to director Bhadran in Ente Mohangal Poovaninju (1982).
Shanker gave break to director Priyadarshan in Poochakkoru Mookkuthi (1984).
Shanker gave break to director T.S.Suresh Babu in Itha Innu Muthal (1984).
Shanker gave break to director Venu Nagavally in Sughamodevi (1986).
Shanker produced Chekkaeran Oru Chilla for director Sibi Malayil, which made him a family films director.
Shanker's debut Malayalam film "Manjil Virinja Pookkal" (1980) as well as debut Tamil film "Oru Thalai Raagam" (1980), both became blockbusters, thus creating a unique record of giving 2 blockbuster films in 2 different languages in his debut.