Doraemon (1979)
The Substitution Rope (8x2)
:
Shizuka wishes to be a boy so Nobita decides to swap bodies with her using Doraemon's substitution rope. While Shizuka enjoys her time in Nobita's body, Nobita finds it hard to live as Shizuka. In the end, they decide to switch back after Shizuka sees something she shouldn't as Nobita. (Not to be confused with a 1980 episode with a similar title)