The Z Fighters had a much better understanding of Goku's capabilities compared to the Androids. They were well aware that Goku had been training relentlessly over the past three years to surpass the Super Saiyan level. Although they weren't certain if Goku had achieved this goal, they knew his strength had significantly improved since he first attained the Super Saiyan form.
As expected, the battle between Goku and Android 19 was completely one-sided. Android 19 was no match for Goku's overwhelming power. Within a few rounds, Android 19 was nearly dismantled by Goku's might, his large face marked with the imprints of Goku's attacks.
Dr. Gero, having witnessed John's and Goku's transformation into Super Saiyans during their battle with Frieza on Earth, had reinforced Android 19's construction. Despite Goku's strength far surpassing his initial Super Saiyan transformation, he couldn't easily defeat this enhanced Android 19.
Dr. Gero, creator of Android 20, was shocked to see his carefully modified creation, designed specifically to counter Super Saiyans, being beaten so badly. He exclaimed in disbelief, "This is impossible! Even if you transformed into a Super Saiyan, you couldn't be this powerful!"
As he spoke, Dr. Gero activated his scanner to assess Goku's power. The readings indicated that Goku's energy levels were significantly higher than when he first transformed into a Super Saiyan, at least 50% stronger.
While Dr. Gero was terrified, the Z Fighters felt more at ease. They knew that the battle against the Androids was already in their favor, even without John's intervention.
Before John left to save the universe, he had reminded Goku to take his special medicine. Goku's heart condition hadn't resurfaced in a long time, and he had indeed followed everyone's advice and taken the medication for his viral heart disease.
John, feeling relieved, said to Gohan, "Gohan, your father did well this time. His heart condition hasn't flared up, and he seems to have listened and taken the medicine."
Gohan, sounding puzzled, replied, "No, Dad didn't take that medicine. He hasn't had any heart attacks since that future boy mentioned it."
Everyone was taken aback by Gohan's words and quickly turned their attention to Goku.
Just as they were talking, the situation in the arena took a turn. Goku's energy became unstable, and he clutched his chest with his right hand, his forehead drenched in sweat. It was clear that his heart condition had inconveniently chosen this moment to act up.
Android 19, seizing the opportunity, began to counterattack and relentlessly assault Goku.
The intense pain in his heart left Goku unable to mount an effective defense, and he was soon knocked to the ground by Android 19. The android then grabbed Goku by the neck and started absorbing his energy, causing Goku to revert from his Super Saiyan form to his regular black-haired state.
No one had anticipated such a sudden turn of events.
"Quick, save him!" John shouted.
He tried to rush to Goku's aid, but Dr. Gero blocked his path, intending to hold him back so Android 19 could finish off Goku.
"Goku has a heart condition, I don't!" John declared, transforming into a Super Saiyan and preparing to take down Dr. Gero.
Just then, a figure burst into the arena and kicked Android 19 away, who had been relentlessly attacking Goku. It was Vegeta, who had been absent until now.
John and Dr. Gero, who were about to engage in combat, halted their actions.
Vegeta picked up Goku, who was lying on the ground clutching his chest, and tossed him to John.
Dr. Gero attempted to intercept them in mid-air, but John anticipated his move and flew in front of him, kicking him away. He then turned around and caught Goku.
To avoid the risk of infection, John held Goku by his belt and carried him down, hoping Goku wouldn't blame him when he woke up.
Looking at Goku in pain, John asked the others, "Who will take Goku back? He needs to take his medicine quickly; hopefully, it's not too late."
Gohan, anxious, said, "Uncle John, let me take my father back!"
But Yamcha raised his hand and said, "Let me do it. With my current strength, I'd only be a burden to you here. I'll take Goku home."
"Okay, Yamcha, thank you," John said, handing Goku to Yamcha. "Viral heart disease is contagious, so be careful. After you take Goku home, take some medicine yourself to be safe."
"I'll take good care of Goku, Uncle Yamcha," Gohan added.
"Don't worry, I'll look after Goku. But you all need to give it your best too. I hope to hear good news from you all," Yamcha said, carrying Goku on his back and flying towards Goku's house on Mount Paozu.
As Yamcha flew away with Goku, Android 19 tried to follow, but John drew a deep fissure in the ground in front of him with a wave of his hand.
"Cross this line and die!" John declared coldly.
Dr. Gero chimed in, "Forget about him, 19. We can finish off these guys first and then have dessert."
Hearing the Androids' words, Vegeta scoffed, "You fools, don't you think there's only one powerful person, Kakarot?"
Dr. Gero responded, "Oh, so you're a powerful warrior too, Vegeta? A Saiyan prince who can't transform into a Super Saiyan!"
"Hmph!" Vegeta scoffed at Dr. Gero's words. "It seems you've done your research on me, but you're missing one crucial detail. You can't follow me into space."
"Your information is outdated. Super Saiyans are no longer a threat to me! Ha..." Vegeta said, gathering his energy and transforming into a Super Saiyan, his golden aura shining brightly.
Upon seeing Vegeta's transformation, everyone, including Piccolo, breathed a sigh of relief. They had been startled by Goku's heart attack, and only John was concerned about the possibility of losing to the two Androids.
From their brief encounter, it was evident that these two Androids were far superior to an ordinary Super Saiyan in a one-on-one fight.