Here is a breakdown of the fight arc so you know exactly what happens in each episode.
The Pain’s Assault Arc (Episodes 152–169)
The definitive clash between and Pain (Nagato) stands as one of the most culturally significant showdowns in anime history. The primary battle takes place across seven consecutive episodes in Naruto Shippuden: Episodes 163 to 169 . This specific confrontation forms the emotional and action-packed peak of the broader Pain's Assault Arc , which spans from episodes 152 to 175.