Naruto and Sasuke were best friends until Sasuke became a Rogue Ninja to avenge the death of his family. Naruto swore to bring Sasuke back to the village yet that promise has gone unfulfilled through both the original series and the ongoing sequel Naruto: Shippuden.
Nearly a decade later, Sasuke returns to the village in the final episode of Naruto SD: Rock Lee no Seishun Full-Power Ninden, a spin-off series that replaces Naruto with Rock Lee as the hero. Tenten points out the absurdity of having this dramatic battle play out between two characters that have no connection to each other but Lee explains how he once loss a popularity contest to Sasuke. The real reason they fight is that Sasuke uses a technique that sabotages ninjutsu, which doesn’t affect Lee who relies on physical attacks and a few special attacks like a not-so-sexy jutsu.
Sasuke plays the straight man but even his attacks are parodied. A giant giraffe appears for Sasuke’s lightning attack, Kirin (Japanese word for giraffe). The first time the the attack is used, the evil Orochimaru uncharacteristically sacrifices himself.
“Because crushing the Leaf is my bit,” he explains. “And I won’t let Sasuke steal it.”
Sasuke summons all his power for one final attack. The giraffe reappears and simply announces “I’m Kirin.”
The battle concludes with no explanation and Lee leaves the village to continue his training. He returns in the second part of the episode as does Orochimaru, who once again sacrifices himself to save his worthy adversary (at least in this series).
Watch Naruto SD episode 51: