Nobita Doraemon 2005 episode 8

            Luka The Dolphin 

One day, at the ground, Nobita, Suneo, Gian, and Shizuka were having a talk. Suneo said, "My family went to the beach, and we had a lot of fun there.

 We did fishing and boating, and we caught a very big fish." Doraemon was also present on the ground. Nobita told Doraemon that he, too, wanted to go to the beach and try fishing to catch a big fish.

Doraemon agreed, and he took out his gadgets. He placed a Hula Hoop-type gadget in the water and another gadget underground, turning the ground into a fishing-friendly area for the fishes. 

As Nobita and Doraemon were fishing, Nobita noticed a big fin in the water. Doraemon thought it was a shark, and Nobita started running.

 However, the fin turned out to be a dolphin. Nobita was surprised, and Doraemon explained that dolphins are never alone.

Nobita and the dolphin started playing, getting fully dirty in the process. Just as they were having fun, Nobita's mother, who was returning from the market, arrived and got angry at Nobita for not doing his homework.

 Nobita hurriedly promised to complete his homework and followed his mother home, with the dolphin tagging along.

Nobita wanted to play with the dolphin, so he decided to finish his homework quickly. After completing his tasks, his mother allowed him to go out and play with the dolphin.

 Nobita happily hung the clothes to dry, and the dolphin joined in the play, fetching a ball. Doraemon commented on how good the dolphin was at playing.

As they played till night, Nobita thanked the dolphin. His mother reminded him to go to sleep for school the next day. In the morning, Nobita was late for school, but with the help of the dolphin's jumps, he made it on time.

 Nobita thanked the dolphin for the assistance.

In class, Nobita shared the story with his friends, but Giyan and Suneo didn't believe him and made fun of him. Shizuka, however, wanted to see the dolphin. When Nobita returned home to find the dolphin, named Luka, he couldn't locate it. 

Desperate to prove the existence of Luka, Nobita decided to organize a show.

He, along with Doraemon, trained Luka for the show. When the friends arrived, they were surprised to see Nobita and Doraemon dressed like dolphins, performing tricks.

 However, at the end of the show, Nobita decided that Luka deserved to be with its friends. He left Luka with its companions, and both Nobita and Doraemon felt emotional.

Suneo, Shizuka, and Giyan arrived and were astonished to see Nobita and Doraemon's performance.

 The story concluded with the realization that Nobita and Doraemon had created a memorable moment with Luka before parting ways.