If you want to experience the original 2000 masterpiece by Christopher Nolan, it is available through legitimate channels in its original English language (often with subtitles):
If you are looking for the "Tamil Memento ," you are likely thinking of , starring Suriya. memento tamil dubbed movie 256 verified
However, the film has deep roots in Tamil cinema history, having inspired one of the most successful Indian action thrillers of all time. The Memento and Tamil Cinema Connection If you want to experience the original 2000