Upgrade to Super Saiyan

is the fourth episode of the Androids Saga and the one hundredth and twenty-ninth overall episode in the uncut Dragon Ball Z series. This episode first aired in Japan on March 4, 1992. Its original American airdate was September 19, 2000.
==Summary==
The episode starts with Goku grabbing his chest. The Dragon Team now realize that the heart virus that Future Trunks warned him about is attacking him. He then falls to the ground. Krillin then throws him a Senzu Bean, and he eats it. Android 20 explains that they know the healing powers of the Senzu Bean, and that they will not allow him the time he needs to heal. Android 19 then hits his earring and shoots Eye Lasers at Goku. Goku flies out of the way, but Android 19 meets him in the air with a powerful punch to the jaw. He elbows him in the back, knees him in the stomach, and double axe handles Goku to the stomach, knocking him to the ground.
Goku struggles to get up, and Gohan exclaims that the Senzu Bean is not working. Krillin does not believe it and says that they have always worked before. Gohan then says that they need the antidote, but Goku must return home to get it. Android 19 then mangles Goku even more, kicking him in the jaw, punching him upwards from underground, kicking him down again, tackling him on the ground, kicking him in the side of his head, headbutting him with his pointed hat in the back midsection, then finally kicking him away, all very fast. Goku is once again on the ground, and he is now unable to sustain the Super Saiyan transformation and reverts to normal. Android 19 lands on him hard and sits on him (Severely injuring him due to 19's immense body weight.). He pins his arms to the ground with his feet. He opens his hand, revealing his energy draining device, and grabs Goku in the throat. He says that now he will drain all of his energy. Goku struggles to get away, but Android 19 just smiles and begins to drain his energy. Piccolo says that this is it, Goku is in trouble. He says to move in.
They all fly over towards Goku, but Android 20 flies in their way. He says that they will stay where they are, unless of course any of them are foolish enough to think they can get past him. All of them look scared, and he says that’s what he thought. Piccolo smiles and says to think again, and he tries to kick him. The Android moves back and shoots Eye Lasers, hitting Piccolo in the heart. He falls to the ground and Gohan goes down to his side. Krillin asks the Android why he hurts people, and he says not to test his patience, and asks if he has learned anything from Piccolo's mistake. Android 19 continues to drain Goku’s energy, and Tien Shinhan says that they have to do something. Android 19 continues to drain Goku of his energy, and Goku begins to lose his grip on Android 19’s arm. All of a sudden Android 19 gets kicked in the head and falls to the ground. It is Vegeta. He says that nobody kills Goku while he's around, and that destiny has reserved that pleasure for him. Everyone is surprised to see Vegeta, and Piccolo explains that Vegeta interfered, and that is why he did not hit Android 20.
Vegeta says Goku is pitiful, and that he was warned about the virus. He tells him that turning into a Super Saiyan could only make it worse. He says Goku is far too forgiving to be a great warrior. He tells him that he will finish the Androids, but Goku is next. He kicks him to the side and Piccolo catches him. Yamcha agrees to fly Goku home, and he lifts him up. Gohan tells him he’s counting on him, and Yamcha flies away with Goku on his shoulder. Android 19 prepares to follow them, but Android 20 tells him to let them go. Android 20 says that they can finish Goku at the moment of their choosing. He says that until then they can entertain themselves by destroying all of his friends. Yajirobe is sitting on a cliff with Bulma, playing with baby Trunks. Trunks starts to cry, and Bulma uses Yajirobe’s scarf as a diaper for Trunks. Bulma says she wants to go see the Androids, and Yajirobe gets scared. After a small argument, Yajirobe agrees to go, and they climb in the ship and fly away. Back at the fight, Krillin thinks they should leave.
Everyone finally convinces him to stay, and Android 19 asks if he can finish off Vegeta. Android 20 says that 19 is being very greedy, but agrees to let him fight Vegeta, but he gets to finish off the rest. Android 19 gets into a fighting stance and flashes his energy absorber. Vegeta says he knows about them, and that if he can't blast him away, he will simply pound him into a pulp. Android 19 only smiles and explains that Vegeta only knows a few of his moves, and he knows all of Vegeta’s. Vegeta asks if that is true, why did he act so surprised when Kakarot turned into a Super Saiyan? He says that it is because his database does not include the battles they had in space, and that his creator took a fine chapter not to include in his memory. Vegeta then asks him if a machine like himself ever experiences fear. He strains for a moment, and then his hair begins to flash on and off yellow. His eyes start to turn green, and the ground around him begins to fall apart. Both the Androids are very surprised, and Android 20 exclaims "Not him too!" There is a flash of light and then Vegeta stands there, a full Super Saiyan. He sinks way into the ground and stands in a giant hole. Gohan exclaims that there is a new member of the Super Saiyan club, and Krillin says that he thought you had to be like Goku to become a Super Saiyan. Vegeta explains that there is more than one way to reach the goal, and then he begins to explain how he became one.
Vegeta says that his motivation was very different from Goku's, that his was to be the very best. He tells of how he trained in extreme conditions, and in four-hundred and fifty times gravity, a simple training exercise became a struggle for survival. Even the simplest moves required every ounce of will power he had. The only thing that held his body together was his desire to become stronger than Kakarot. He decided to continue his training in space, where he would not have any distractions. When a lightning storm erupted on the planet he was on, he welcomed it. Meteors began to fall, and he was determined to protect himself and his ship. It was his only way off that nightmarish piece of rubble. He thought he had everything under control, but then a giant meteor appeared. Normally it would be nothing to destroy that rock, but after training in 450 times normal gravity, it took everything he had, and more. Then something inside of him snapped, he did not care anymore. He did not want to be a Super Saiyan anymore. He did not care if he lived, he did not care about anything.
And then, it happened. He transformed into a Super Saiyan. He exclaims that the sleeper has awoken, and he is the prince of all Saiyans once again. Android 20 says he is tired of this nonsense, and even with his new power he is no match for the Androids. He asks Android 19 to demonstrate, and he fires two Eye Lasers at him. They both miss, and Android 19 flies into the air, firing two Eye Lasers at Vegeta again. He lets them hit, and there is an explosion. When all the smoke clears, Vegeta is still standing, not even scratched. Android 19 laughs and charges at Vegeta, about to punch him.
==Major Events==
*The heart virus begins to attack Goku, but it happens much later compared to the alternate timeline.
*Vegeta reveals that he is a Super Saiyan and transforms for the first time on screen.
==Battles==
*Goku (Super Saiyan) vs. Android 19
*Piccolo vs. Android 20
*Vegeta (Super Saiyan) vs. Android 19
==Appearances==
===Characters===
*Goku
*Gohan
*Krillin
*Bulma
*Trunks
*Yajirobe	
*Yamcha
*Tien Shinhan
*Piccolo
*Dr. Gero
*Android 19
*Vegeta
===Locations===
*Southern Continent
*Amenbo Island
===Objects===
*Senzu Bean
*Capsule Corporation Spaceship 
*Yajirobe's Katana
===Transformations===
*Super Saiyan
===Bruce Faulconer tracks===
*"Cell & Piccolo Face Off" - When Goku suffers from the heat virus during his battle against Android 19 on the Southern Continent.
*"Yamcha Meets Droids" - When Krillin tells Gohan not to intervene.
*"Goku's Spirit Bomb" - When the Z Fighters are shocked as Goku is beaten by Android 19 on the Southern Continent.
*"19 Almost Kills Goku" - Whan Android 19 attempts to absorb Goku's energy.
*"Vegeta's Theme" - When Vegeta arrives at the battle scene on the Southern Continent and kicks Android 19 away from Goku.
*"Vegeta's Theme" - When Vegeta faces Android 19 before transforming into a Super Saiyan.
*"Vegeta - Super Saiyan" - When Vegeta turns into a Super Saiyan for the first time on screen.
*"Long Flashback" - When Vegeta explains how he turned into a Super Saiyan.
==Differences from the manga==
*Bulma using Yajirobe's scarf to change Trunks' diaper after he urinates on Yajirobe is exclusive to the anime.
*In the manga, Vegeta briefly described how he became a Super Saiyan. In the anime however there is a flashback sequence showing Vegeta training in 450x Gravity on another world which is soon in range of a large meteor shower which assists in Vegeta transforming for the first time.
** On a similar note, the manga has Vegeta claiming he indeed achieved the Super Saiyan form via Heart Purity, while specifying that he managed to do so by specifically being pure evil. The anime omits this claim altogether.
*Android 19 firing a volley of energy blasts at Vegeta which fail to penetrate his Ki is exclusive to the anime.
==Trivia==
*Vegeta makes his debut as a Super Saiyan in this episode. He appears wearing what seems to be the Battle Armor created by Bulma, and appears as such in his training flashbacks. It is never clarified as to whether or not this armor was actually created by Bulma or scavenged from space by Vegeta in the years in between the Trunks Saga and the Androids Saga, as the Battle Armor created by Bulma, identical to the armor Vegeta wears here, makes its "official" debut in "Saiyans Emerge".
*After Vegeta arrives at the battle, the scene cuts back to Bulma, Trunks, and Yajirobe. Bulma then says to Trunks "Let's go see daddy," when she had no idea where Vegeta was a few episodes prior, so she could not have known that Vegeta was fighting the androids. Theoretically, it is possible that Bulma saw Vegeta while heading off screen to the battlefield where Goku was fighting Android 19.
*After Bulma runs out of clean diapers, she changes Trunks into Yajirobe's scarf. Trunks is seen in the next shot with the same blue diaper he was changed out of earlier. A possible explanation is that Yajirobe's scarf was put on underneath Trunks' diaper.
*When Krillin flies to give Goku a Senzu Bean, he is wearing his old fighting shoes. This is inconsistent with the previous episode, where he was shown wearing boots.
*In the Funimation dub, there is a reference to one the most popular quotes from the 1984 movie Dune when Vegeta says, "The sleeper has awakened", referring to himself becoming a Super Saiyan.
*In the Westwood dub version of this episode, there is a scene where Gohan's mouth flaps and has no accompanying dialogue.
*The flashback where Future Trunks warns Goku about the heart virus is taken from "Mystery Revealed".
*When #20 states that #19 did well against Goku, the latter android's sleeves are colored black like his shoulder fabrics.
*In the original Japanese broadcast, the first 15 seconds of the next episode preview were devoted to next week's show, and the other 15 seconds were devoted to a movie ticket lottery drawing for Dragon Ball Z: The Return of Cooler (Released in theaters on March 7, 1992). This preview was not included in the Dragon Box. Instead, the preview used was the rerun version for the next normal episode, "The Secret of Dr. Gero".
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