Many people have argued on why did Doraemon leave Nobita when he grows up, and thousands of fanmade endings have been created, resulting in a lot of confusion.It is hinted on the Stand by Me Doraemon, when future Nobita refused to see his childhood friend Doraemon, that either they got separated during a horrible event or Nobita finally moved on with his life without his help.One of the 2005 episodes shows present Nobita body-shaming future Nobita's fat stomach (aka body-shaming himself).There's one episode from 1979 that shows Nobita Nobi (Future) reuniting with Doraemon after present Nobita and Doraemon visited the future to look for the Time Capsule that they buried 25 years ago.It's unknown how Nobita doesn't wear his glasses any more in the future, possibly changed it with eye contacts instead.Nobita Nobi (Future), on Stand By Me, talking to present Nobita Shizuka is Nobita's childhood friend, to whom he eventually engages to when Doraemon and a young Nobita interfered to change the latter's life for the better.

Stand by Me Doraemon: Better figure, has his glasses on, and still has the same personality like present Nobita.Mini-Dora SOS!!: Same appearance like from the 1979 (Remade) version.Young Adult Nobita in 2005 is pretty similar to the Adult Nobita in 1979 (Remade), since he still wears glasses according to the image, then later takes it off at the age of 35.He is seen without his glasses anymore, huge body, more hair and somehow, has the same height like his father, Nobi Nobisuke. Nobita Nobi (Future) in this version is very different compare to the 1979 anime.(1979 version of the anime), he finally takes his glasses off at the middle age. 1979 (Remade): Nobita still wears his glasses up to that day, has a skinny body (not like from the 2005 version), his face is still the same when he was kid, and the same height like from future Shizuka.1979 (Original): The very original version of Adult Nobita from the 2005 version.One of the episodes that Nobita visited the past to see his past self and Doraemon. Nobita Nobi as an adult only appears from the episodes that happened around the future. Although he is still lazy, he has grown to be more smarter and intelligent than he was as a child. Nobita is a good-hearted and generous man.

Future Shizuka in nobita kiss