Dragon Ball Z: Super Android 13!

The mad scientist Dr. Gero is killed by his awakened Android creations, Androids 17 and 18. His apparent death marks the end of his physical threat, but unbeknownst to the heroes, his consciousness has secretly copied itself into an underground supercomputer, preserving his vendetta.

Gero's mind survives inside an underground supercomputer, continuing to plot his revenge against Goku. The machine keeps his dream of creating the ultimate android alive, a threat that will resurface despite his apparent demise.

In a city shopping mall, Goku, Gohan, Chi-Chi, Krillin, Master Roshi, Oolong, and Future Trunks eat lunch in a restaurant. Androids 14 and 15 enter the city and begin sowing chaos as they hunt for Goku, eventually locating him in the restaurant.

The androids reveal themselves and attack, quickly overpowering Goku. Trunks steps in to aid him, buying time to protect the patrons.

Goku suggests taking the battle away from the city to avoid harming innocent people. The Androids give chase, pursuing the heroes across the city and into the open streets.

Goku and Trunks engage the Androids until Android 13 appears. 13 explains that despite Dr. Gero's death, his underground computer remains programmed to kill Goku out of revenge for the Red Ribbon Army.

Vegeta arrives and joins the fight, bringing a surge of power. Goku, Vegeta, and Trunks all power up to Super Saiyan, bracing for a tougher confrontation.

Trunks defeats Android 14 while Vegeta defeats Android 15. The two downed androids leave Android 13 to contend with the remaining heroes.

Android 13 surrounds and absorbs 14 and 15's cores, transforming into a hulking, more powerful form. The absorbed energy makes 13 a formidable threat.

Super Android 13 brutally overwhelms Goku, Vegeta, and Trunks. Seeing no other option, Goku begins summoning ki for the Spirit Bomb while their allies hold off the rampaging android.

Piccolo arrives to hold off Super Android 13 long enough for Goku to transform back into Super Saiyan and prepare the Spirit Bomb. The trio continues to battle while Piccolo buys a crucial window.

Goku transforms and absorbs the Spirit Bomb's energy. He lunges at Super Android 13, punching through his abdomen and sending him into the Spirit Bomb core where he is obliterated.

With Super Android 13 destroyed, the underground computer shuts down for good. Krillin and Gohan are hospitalized from the battle as the heroes recover from the ordeal.

The group modestly celebrates their victory together. Elsewhere, Piccolo and Vegeta sit on an iceberg, isolated from the celebration and reflecting on the battles just endured.