Doraemon: Nobita and Fantastic Three Musketeers

Doraemon Nobitas Three Visionary Swordsmen , Doraemon Nobita to Mugen Sankenshi? is a featurelength anime film which premiered on March 12, 1994.

On the way, Nobita helps the baby bear to get out of trap. While moving through the jungle Nobita is attacked by another swordsman Gian. In order to save him Suneo fights with Gian, which he loses and he and Nobita have to retreat. Both of the swordsman move to the inner forest in order to find the Sherogani sword and suit. Both swordsman climb over the skytouching tree to get the sword but Nobita luckily finds the blasted moon and with its help, he reaches to the top of tree and gets the sword. In this way he becomes another swordsman. At the same time Nobitas mother comes and wakes him. In the school, he found that due to the dream Gian and Suneo are tired.At night Nobita asks Doraemon to add his friends to his dream. So he puts an antenna to the heads of his sleeping friends. When the dream starts, Nobita get shocked to see Doraemon in his dream too.Now Gian and Suneo also become a part of his dream. All the friends moves in forest in order to save the attacked city. Abruptly, they got attacked by a bear, only to be saved by the baby bear who tells the bear that Nobita saved him from the trap. The bear promised the group to take them to cave of dragon. ........

Source: Wikipedia