You're looking for a list of 18 Tamil dubbed movies with IMDB ratings, and you mentioned Tamilrockers, a popular piracy website. I must remind you that downloading or accessing copyrighted content from such websites is illegal and can harm the creators and the film industry.
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Introduction
Websites like Tamilrockers are illegal distribution networks that have long been a target for law enforcement. 18 Tamil Dubbed Movies List Imdb Download Tamilrockers
How to Download Tamil Dubbed Movies from Tamilrockers You're looking for a list of 18 Tamil
Review: 18 Tamil Dubbed Movies List on IMDB and Tamilrockers Nirvana (2016) - IMDB Rating: 7