Since Disney owns the rights to the distribution of many Doraemon series and movies in India, Disney+ Hotstar is the primary legitimate source. While the daily episodes are widely available in Hindi, Telugu and Tamil dubs of movies are added periodically.
The Telugu voice cast (especially the voice actor for Nobita and Doraemon) does a fantastic job of capturing the emotional and comedic essence of the original Japanese version. If you are looking for recommendations, look for these titles: doraemon movies in telugu download
Ignoring the moral and legal issues, downloading from piracy websites like TamilRockers, Movierulz, or Isaimini (which often host Doraemon content) comes with severe risks: Since Disney owns the rights to the distribution