Here is a list I've put together of most of the major Ninja Battles in Naruto Shippuden and which episode they fall under for your viewing pleasure. All episodes listed are at the very start of each battle.
1.Episode 3-Gaara vs Deidara.
2.Episode 7-Kankuro vs Sasori.
3.Episode 13-Team Gai vs Kisame, Team Kakashi vs Itachi.
4.Episode 20-Sakura+Chiyo vs Sasori, Naruto+Kakashi vs Deidara.
5.Episode 72-Hidan+Kakuzu vs Two Tails.
6.Episode 77-Team Asuma vs Hidan+Kakuzu.
7.Episode 83-Team Kakashi vs Hidan+Kakuzu.
8.Episode 113-Sasuke vs Orochimaru.
9.Episode 122-Sasuke vs Deidara.
10.Episode 130-Jiraiya vs Pain.
11.Episode 135-Sasuke vs Itachi.
12.Episode 143-Sasuke vs Killer B.
13.Episode 157-Pain vs Konoha.
14.Episode 159-Kakashi vs Pain.
15.Episode 163-Naruto vs Pain.
16.Episode 202-Sasuke vs Raikage.
17.Episode 206-Killer Bee vs Kisame.
18.Episode 209-Sasuke vs Danzo.
19.Episode 245-Naruto vs Kyubi.
20.Episode 248-Minato vs Tobi + Kyubi.
21.Episode 250-Kisame vs Gai.
22.Episode 252-Konan vs Tobi.
I will leave it there for now and edit in more Battles once the war arc progresses.
1.Episode 3-Gaara vs Deidara.
2.Episode 7-Kankuro vs Sasori.
3.Episode 13-Team Gai vs Kisame, Team Kakashi vs Itachi.
4.Episode 20-Sakura+Chiyo vs Sasori, Naruto+Kakashi vs Deidara.
5.Episode 72-Hidan+Kakuzu vs Two Tails.
6.Episode 77-Team Asuma vs Hidan+Kakuzu.
7.Episode 83-Team Kakashi vs Hidan+Kakuzu.
8.Episode 113-Sasuke vs Orochimaru.
9.Episode 122-Sasuke vs Deidara.
10.Episode 130-Jiraiya vs Pain.
11.Episode 135-Sasuke vs Itachi.
12.Episode 143-Sasuke vs Killer B.
13.Episode 157-Pain vs Konoha.
14.Episode 159-Kakashi vs Pain.
15.Episode 163-Naruto vs Pain.
16.Episode 202-Sasuke vs Raikage.
17.Episode 206-Killer Bee vs Kisame.
18.Episode 209-Sasuke vs Danzo.
19.Episode 245-Naruto vs Kyubi.
20.Episode 248-Minato vs Tobi + Kyubi.
21.Episode 250-Kisame vs Gai.
22.Episode 252-Konan vs Tobi.
I will leave it there for now and edit in more Battles once the war arc progresses.
