In hell, Dr. Gero and Dr. Myuu team up and create Artificial 17. They open a portal to go back into the land of the living and escape to Earth. All the enemies which Gokou has encountered in the past are revived and escape to Earth. Gokou is tricked into going to hell to fight Cell and Freeza. Android 17 is mentally tempted by Artificial 17 to fuse to become the strongest being in the universe. Android 17 seeks out Android 18 and trys to persuade her to join him in conquering Earth. Android 18 refuses to be part of his evil, and Android 17 kills Kriylln and Android 18. Artificial 17 and Android 17 fuse into Super 17. Without Gokou on Earth, our heroes don't stand a chance against Super 17.
During battle, Dr. Gero is held hostage. With Dr. Myuu's command, Super 17 kills Dr. Gero anyway. Later, Dr. Myuu also gets betrayed and killed. Gokou defeats Cell and Freeza, but is stuck in hell. Piccolo, who is in heaven, causes chaos in order to be sent to hell where he can help Gokou go back to Earth. Using the same technique that Android 17 and Artificial 17, Piccolo and Dende create a portal that allows Gokou to enter back to Earth. A battle between Gokou and Super 17 follows, and Super 17 is killed by Gokou with the help of Android 18.
The Dragonballs are gathered to bring everyone who was killed back to life. When Shenlong was summoned, something went wrong. An evil Shenlong appears and laughs wickedly. Our heroes learn that the Dragonballs have cracked due to negative energy that stored inside the balls when negative wishes were made. A cloud appears around the evil Shenlong, and it transforms into seven evil dragons, each of a Dragonball. The dragons fly off in different directions and wreck chaos. Each dragon has its own element. When it finds that element, it will take on its true form.
Gokou and Pan fly off to fight these dragons. First, they encounter Ryan-Shenlong. Ryan-Shenlong tells that he was born when Bora was wished back to life. This dragon of the 2 star Dragonball is of water pollution. It was tricked into swimming in clean water. After it was weakened by this action, Gokou and Pan attack and kill it. The 2 star Dragonball is restored.
Next, Gokou and Pan follow the dragon radar's signal and encounter Uu-Shenlong. It was born in the 5 star Dragonball when Gokou was wished back to life to fight Vegeta. This dragon of electricity was weakened in rain and destroyed in its weakened state. The 5 star Dragonball is recovered.
Ryuu-Shenlong is the next to appear. This dragon was born when Oolong made the wish for women's underwear while fleeing from Pilaf. This dragon possesses the power of hurricanes. Gokou learns of its weakness and attacks it on the head. Ryuu-Shenlong was easily defeated and the 6 star Dragonball was restored.
Following this, Gokou and Pan fly to Chii-Shenlong, which was born in the 7 star Dragonball when all the people killed by Majin-Vegeta were wished back to life. Pan gets tricked and becomes trapped in the dragon's body. Gokou rescues her and destroys Chii-Shenlong. Another Dragonball is recovered.
Suu-Shenlong is next for Gokou and Pan to encounter. It was born when Piccolo was wished back to life. This dragon of the sun is associated with the 4 star Dragonball. It challenges Gokou in a match and the two fight. All of a sudden, San-Shenlong, Suu-Shenlong's brother and of the 3 star Dragonball appears. After getting mocked by his brother for losing honour in interfering with the match, the dragon of ice fights Gokou anyway. It is slayed in battle, and Gokou and Suu-Shenlong continue their match. Gokou admires Suu-Shenlong's sense of honour.
The match becomes interfered again when another third party kills Suu-Shenlong. This party is Ii-Shenlong, of the 1 star Dragonball. Gokou defeats it in Super Gokou 4 stage, but the dragon survived. It defeats Pan and steals all the restored Dragonballs. Ii-Shenlong fuses with the balls and powers up. Super Gokou 4 is no match for it in its fused state.
Bulma created a brute ray that allowed Vegeta to go Super level 4, and Super Vegeta 4 joins Gokou in battle. The two are still no match for Ii-Shenlong. Another strategy is used: Super Gokou 4 and Super Vegeta 4 fuse and become Super Gogeta 4!

Ii-Shenlong loses and the Dragonballs it fused with are restored, but the fusion of Super Gogeta 4 wears off before Ii-Shenlong is killed. Ii-Shenlong fuses with the Dragonballs once again, but Gokou gets to the 4 star Dragonball before Ii-Shenlong can and swallows it so that the dragon can't fuse with it. Eventually, Gokou spits the Dragonball back out and Ii-Shenlong absorbs it. Vegeta suggests to use fusion again, but Gokou is too weak to go Super level 4. Therefore, he remains in his small size; he cannot fuse with Vegeta in this state due to size differences. Ii-Shenlong boasts to kill Gokou and Vegeta.
One last chance of hope remains. Gokou begins to create a Genki-Dama. Everyone on Earth raises their hands to donate energy to Gokou. Gokou conveys a message  to Kaiou and says that the energy is not enough. The Kaious agree to help seek life forms across the galaxy to help donate energy to Gokou. All the characters encountered in space in the Baby Series are shown again and they raise their hands. Gokou's giant Genki-Dama is created and it destroys Ii-Shenlong.
All the Dragonballs are restored to normal, but something is wrong. Shenlong appears without being summoned and tells that he will not make any more wishes because of all the trouble the Dragonballs have caused. Gokou convinces it to make the final wish of restoring all the civilians killed during the fights against the dragons. The wish is granted, and Gokou is told to ride on Shenlong's back. Gokou does so. Chi-Chi and her sons go home to prepare a big feast while awaiting Gokou's return, unaware what's going on. Pan notices Gokou's tattered clothes on the ground and asks if her grandpa is gone for good. Vegeta replies that he is. On the dragon's back, Gokou visits the Z warriors. At the end, Gokou lies down and the Dragonballs are absorbed into Gokou and Gokou disappears. Shenlong coils up and flies at the camera. The screen turns white.
It is now 100 years later. Gokou Jr. (Pan's grandson) is at the latest Boudaikai Tenkaichi tournament. He is about to compete against Vegeta Jr., one of Vegeta's descendants. The two boys to Super Saiyan level and fight. Pan is a spectator in the audience. She notices adult Gokou watching the fight at the other side of the stadium. Pan goes to him, but loses her grandfather in the crowd. Gokou walks away, and highlights of Dragonball-Z-GT are shown.

PS: The fights against Super 17 was considered part of the battles involved with the Evil Shenlongs. This is why Klilyn and Android 18 were restored in the final wish granted by Shenlong.
 
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