When did sasukes curse mark disappear?
Sasuke’s curse mark disappeared during his fight with Itachi… With his Susanoo Itachi also had the sword of Totsuka… Which is actually a Saké bottle… If you remember Orochimaru came out in his snake form, when Sasuke ended up using all of his Chakra, Itachi sealed him into that bottle… along with the curse mark… I don’t forget whole arcs but minor details do slip completely… But in my case I only started Naruto less than two years ago… which means I had so many episodes and chapters to read, I had the advantage of reading them all one after the other without having to wait… So I still remember… If I had followed the series like many others for 10 years, I bet I would forget major stuff…