This movie was absolutely incredible. It was much better than the second Naruto movie, IMO, and I can't decide whether this or the first movie was the best in Part 1. The new summer cloths put on Naruto, Sakura, and Lee were a nice change of pace from the usual ones, and seeing the three work as a team heightened the enjoyment of the movie, as well!
Starting off with Naruto, Sakura, Lee, and Kakashi being given a seemingly simple mission to see the Prince of the Moon Kingdom, Michiru, and his son, Hikaru, back home safely, it of course turns into a wild ride of action and danger, as after seeing a circus, with what Hikaru thinks is an amazing sabertooth tiger, Michiru decides to buy the whole shebang. The mission then becomes exceedingly difficult, as Kakashi and the others have to protect the entire circus, as well! Meanwhile, Naruto gets more and more annoyed at Hikaru, who along with his father, doesn't understand the most important things in life, and thinks that money can get him anywhere. He also has a snobbish attitude. Hikaru, however, just wants some friends, and attempts to make one with Chamu, the sabertooth he admired so much, even though it never truly got along with humans before, as well as Naruto, even though it's not in the best way.
The movie goes on, and as it does, Hikaru gains more of an understanding of life's true meaning, and grows a bond with Naruto and Chamu, too. However, when the group finally reaches the Moon Kingdom, they find that the King's palace has been taken over by one of the nobles, Shabadaba. After a quick battle, they are forced to flee and come up with a plan to get rid of Shabadaba, who only cares about money, and the three ninja assassins he hired to kill Michiru and Hikaru. The current king, and Michiru's father, sadly dies from his chest being turned to stone by the head of the three assassins, making Michiru king of the Moon Kingdom himself.
Time passes, as well as Michiru getting kidnapped by Shabadaba's minions, some intense battles, heart pounding action, and the stuff an action/anime movie needs to be awesome! The end draws nearer, and as Sakura and Lee defeat their opponent, Naruto and Hikaru, with the help of Chamu and his monkey friend, manage to save Michiru, band together despite their injuries, and defeat the man who killed the former king, bringing out with the power of the moon, Naruto's Crescent Moon Rasengan!!
Peace is restored, Shabadaba is overthrown, Michiru finally gains understanding of life's value, and becomes King, and as everyone says their goodbyes, Naruto and Hikaru make a promise to each other, that when Naruto becomes Hokage, and Hikaru becomes King, they'll be there to help when they need it... and that they'll never forget each other.
A wonderful Naruto movie, and the ending when Naruto used the Crescent Moon Rasengan, was just amazing. Just watching Naruto the Movie 3: Guardians of the Crescent Moon Kingdom has made me appreciate the show, Naruto, even more! One mega big BELIEVE IT!!!