Puppet Fight: 10 vs 100!

is episode 26 of the Naruto: Shippūden anime.

Synopsis
Sakura and Chiyo continue the battle with Sasori, who overwhelms them initially. Sakura manages to later destroy Sasori's puppet body, but he reforms back. Seeing this, Chiyo uses the White Secret Technique: Ten Puppet Collection of Chikamatsu, which Sasori counters with his Red Secret Technique: Performance of a Hundred Puppets. Sakura and Chiyo, with the help of her Ten Puppets seem to trap and defeat Sasori, but, under cover of the battle, Sasori secretly transfers the only living part of his body - his heart - into another puppet, and tries to attack Chiyo from behind. Sakura notices this and intervenes, forcing Sasori to stab her through her torso.

Triva

 * Sasori said there are 100 pupuets, but the are over 100, nearly 300 of them. After Sakura nad Chiyo bashed a lot of pupets, the sky appears to have 158 pupuets left.
 * This episode has a refernce to Terminator Salvation, as Sasori works like a cyborg, refernceing Marcus Wright.