The World's Strongest

The beginning of the movie takes place in a land where there are mountains of ice. Gohan and Oolong are climbing a mountain in their search for the Dragonballs. Oolong looks at the Dragon Radar and sees all seven of them gathered together. On another mountain, Dr. Koachin has the Dragonballs and summons Shenron. He wishes that the mountains would melt, destroying his master's icy tomb and freeing him. Shenron grants his wish and disappears. The mountains start to crumble and then melt. A gigantic, metal fortress appears.

Gohan and Oolong are attacked by four green little men. (No, they're not Saibamen!) Piccolo comes to their aid and destroys the green dudes. Then he gets trapped in a red beam and disappears. Gohan and Oolong head back home. At the Kame House, the green men return, looking for Master Roshi. He comes outside and they want him to come with them. When he refuses, they attack and he beats them up. Dr. Koachin arrives and the green men hold Bulma hostage. Roshi and Bulma are taken to the metal fortress, which rises from the lake surrounding the island. Goku hears about their capture and takes off on the Nimbus to rescue them. Inside the fortress, Dr. Koachin says that Roshi is the world's strongest man and must be tested. Behind him is a big metal tank filled with water. Inside it is his master's brain. Koachin sends out three Bio-Technical Warriors to fight Master Roshi. They have weird Japanese names so I'll just call them Blob, Lizard, and Orange Hair. Roshi holds his own for a few minutes against their combined power. Then he fires a Kamehameha which goes straight through Blob's stomach, but bounces back out. After he dodges it, he gets punched in the face and is electrocuted by an energy beam. He is badly injured, but isn't dead.

Gohan has snuck away from home in a jet to help his dad. Bulma is chained up. Dr. Koachin says the giant brain belongs to his master, Dr. Willow. Dr. Willow was a brilliant scientist who was killed during an avalanche. But his brain survived and his assistant, Dr. Koachin, has been preserving the last bit of life belonging to his master inside the glass tank. Dr. Willow is able to speak as well. His goal is to find the world's strongest man and steal his body. Then he will be incredibly smart and have amazing fighting skills. After she hears this story, Bulma immediately claims that Goku is the strongest man. Meanwhile, Goku himself is standing in front of the doors of the fortress. Dr. Koachin notices him and sends Blob to test him. Blob breaks out of the ice and Goku is able to rough him up and then knock him back into the lake. Blob chases him into the fortress. Goku comes across a chamber with a bunch of black balls with spikes on them. He uses incredible dodging skills to get past the black balls and then destroys them. He finishes off Blob by flying through his mushy stomach and then comes ripping out the other end. Blob is destroyed. Goku goes flying through the ceiling and into a new chamber. Lizard and Orange Hair have arrived. Goku holds his own for a minute, but then gets hit by a blast of freezing cold air shot out by Orange Hair. Part of his body is now ice. He is hit with another blast of cold air and now he is completely trapped in a block of ice!

Gohan and Krillin come to his aid and use their combined power to take on the two ruthless foes. Lizard shoots a bunch of tentacles out of his arms and uses them to electrocute Gohan and Krillin. To make things worse, Orange Hair traps them in blocks of ice as well. Goku uses the Kaoken and frees himself from the icy prison. He knocks Orange Hair into the wall and kicks Lizard in the face. With them defeated, he rescues his buddies. They head off to find Master Roshi and Bulma. They succeed and Dr. Koachin says that Goku is the world's strongest man. Dr. Willow explains his plan of stealing Goku's body, who refuses to let himself be defeated. Then, Piccolo appears. He has weird golden things on his head. He is now under Dr. Willow's control. He fights with Goku. Gohan tries several times to help Piccolo but gets beat up. The third time, Piccolo gathers up a blast to kill him with, but Goku jumps in and deflects it.

Krillin tries to stop Dr. Koachin, who turns his arm into a machine gun. Now Krillin must dodge an array of bullets. Bulma escapes from her chains and Koachin is about to shoot her. Until Master Roshi appears out of nowhere and destroys his machine gun. And he breaks the golden things on Piccolo's head in the process. Piccolo is now back to normal. Dr. Willow gets mad and breaks free from being attached to the wall. He becomes a giant robot. They all try and stop him, but can't do it. Goku, Krillin, and Master Roshi all fire Kamehameha waves at the same time, but that doesn't work. Goku uses the Kaoken x3 and a Kamehameha. The fortress is destroyed in the explosion. Krillin thinks it's over, but Goku says that Dr. Willow is still alive! And he is right. The battlefield has become the icy tundra. Master Roshi, Bulma, Gohan, and Krillin run away as Goku gathers energy for the Spirit Bomb.

Goku is about to fire the blast, when Dr. Willow fires an array of ki blasts and knocks him to the ground. Gohan, Piccolo, and Krillin chase Dr. Willow into outer space where they give it everything they've got. They fail, too. Goku gets back up and fires the Spirit Bomb. It flies into outer space. Dr. Willow the Robot fires a big red blast to deflect it, but he fails this time and is destroyed.