When does Sasuke appear in Naruto Shippuden?

Answer 1

You'll have to forgive me for not knowing the exact episode numbers, but Sasuke and Naruto fight several times in Naruto Shippuden for brief bits of time. Also know that this may contain SPOILERS.

First, Naruto and Sasuke begin to fight in the first episode (which is actually just a teaser for what happens in the second story arc) until Orochimaru arrives and stops Sasuke from progressing any further. Then, when the actual story arc that I just mentioned happens, you see that scene play out a little further. After that, Sasuke and Naruto don't really fight or see each other again for a long time. In the manga, however, there is a chapter where Naruto and Sasuke really begin to fight after Pain has destroyed the Leaf Village and Sasuke was trying to disrupt the Hokage Summit. However, at that point Madara came to prevent Sasuke from going any further. As of now, in chapter 517 of the manga, Naruto and Sasuke have not fought again since then, but it's told to us that they will fight relatively soon-ish, and it'll be EPIC!!

For now just continue to enjoy the story as it unfolds, because it's amazing right now.

Answer 2

The introduction episode (1&2) and further on, if you really like Sasuke you can read the manga.

Answer 3

When pain tryies two kill naruto

Answer 4

episode 53 and 54

Answer 5

Wait and see