Naruto will follow the Kyuubi within himself, also known as Kurama. Kurama is the Nine-Tails demon fox that was sealed inside Naruto when he was a baby. Over time, Naruto forms a bond with Kurama and they eventually become allies, working together to protect each other and their friends. Naruto's journey involves learning to control and harness the power of Kurama, ultimately leading to a deep understanding and friendship between the two. **

Both are correct, but they refer to different aspects of the same character. Kurama is the name of the nine-tailed fox spirit in Japanese folklore, and it is also the name of the character in the anime and manga series Naruto. Kyuubi, on the other hand, is the Japanese word for nine-tailed fox, and it is often used to refer specifically to the nine-tailed fox form of Kurama in the series. So, both terms are correct, but they are used in different contexts. **

The voice of the Kyuubi was changed in the English dub of Naruto because the original voice actor, Tony Oliver, was unable to reprise his role due to scheduling conflicts. As a result, a new voice actor, Paul St. Peter, was brought in to provide the voice for the Kyuubi. While the change may have been jarring for some fans, it was necessary to ensure the continuity of the series. **

Naruto can't use his strongest Kyuubi form, also known as the Nine-Tails Chakra Mode, because it requires him to fully control and balance the immense power of the Nine-Tails within him. In order to achieve this, Naruto needs to have a strong emotional and mental control over the Nine-Tails, which he struggles with due to the beast's volatile and unpredictable nature. Additionally, using the strongest Kyuubi form puts a tremendous strain on Naruto's body and chakra, making it difficult for him to maintain for extended periods of time. **

Naruto's Kyuubi form, also known as Kurama Mode, exists in two other colors besides the traditional red. The first alternate color is a golden yellow, which is seen when Naruto fully integrates Kurama's chakra into his own. The second alternate color is a combination of red and black, which is seen when Naruto accesses the full power of Kurama's chakra during the Fourth Great Ninja War. These alternate colors represent different levels of mastery and control over Kurama's chakra. **

Naruto loses Kurama, the Nine-Tails, because Kurama sacrifices itself to save Naruto during a battle. As a result, Naruto can no longer access the Kyuubi mode since Kurama was the source of his power. Without Kurama, Naruto loses the ability to transform into the Kyuubi mode and utilize its immense power. **

Yes, Sasuke learns about the Kyuubi being sealed inside Naruto during the Chunin Exams arc in Naruto Shippuden. Orochimaru reveals this information to Sasuke during their fight in the Forest of Death. This revelation plays a significant role in Sasuke's understanding of Naruto's strength and his connection to the Nine-Tails. **

Yes, Sasuke already knows in the anime Naruto Shippuden that the Kyuubi is sealed in Naruto. He learns about it during the Chunin Exams when he witnesses Naruto's use of the Kyuubi's chakra. Additionally, during their final battle at the Valley of the End, Sasuke directly confronts Naruto about the Kyuubi's influence and its impact on their rivalry. This knowledge plays a significant role in their relationship and Sasuke's understanding of Naruto's strength. **