sadness and sorrow
The fight Between naruto and pain
episode 60 in naruto
Shippuden episode 68.
naruto fight against sasuke
This fight between Danzo and Sasuke happens in Naruto Shippuden Episode 209: Danzo's Right Arm. More information about Itachi comes out in this episode as well.
it starts at episode 163
in episode 160
Naruto Shippuden Episode #26
episode 212 or 213
It starts in episode 19 (shippuden)
Naruto Shippuden episode 29-30
Don't know about linking park fight but fight takes place at around Naruto Shippudden episode 40