Having fought two Demon-level threats Face Ripper and Awakened Cockroach, and later encountered Gouketsu, a Dragon-level Mysterious Being, Genos suffers heavy damage to the point that he is no longer able to move on his own. The cyborg hero is then taken to the lab by a drone for repairing the damage, as well as his improvements for incoming battles.
During his fight against Elder Centipede alongside Bang and Bomb, Genos was heavily damaged by the giant monster, thus he came to the lab at some point for his repairs after the battle. Later, while on his way to Saitama's apartment, the cyborg has a flashback of being repaired and getting a new upgrade from Dr. Kuseno that wholly focuses on attack power.
After learning about the possible creator of The Mad Cyborg, Genos and Saitama travel to Dr. Kuseno's Lab to formulate a plan. They all agree that Genos will lead a frontal assault with Saitama as backup. Kuseno then treats Genos and Saitama to Barbeque. Afterwards, Saitama's physical data is measured in a type of chamber. However, this was interrupted by a group of rogue robots attacking the lab, resulting in Kuseno losing his life and the laboratory being completely destroyed.
As a last goodbye to Genos, Dr. Kuseno reveals a secret under his basement, giving Genos his last upgrade.
At the laboratory, Genos is seen analysing a french fry he stole from Saitama in a restaurant.
- One-Punch Man Manga and Anime; Chapter 40, page 2-4, and Episode 4
- One-Punch Man Anime; Episode 4
- One-Punch Man Manga and Anime; Chapter 40, page 2, and Episode 13
- One-Punch Man Manga and Anime; Chapter 75, page 21, and Episode 21
- One-Punch Man Manga and Anime; Chapter 80, page 2-5, and Episode 22
- One-Punch Man Manga; Chapter 95, page 58-59
|Cities||A-City • B-City • C-City • D-City • E-City • F-City • G-City • H-City • I-City • J-City • K-City • L-City • M-City • N-City • O-City • P-City • Q-City • R-City • S-City • T-City • U-City • V-City • W-City • X-City • Y-City • Z-City|
|Locations||Bang's Dojo • Cafe & Restaurant Togus • Crappy Apartment Building • C-City Super Stadium • Final Training Ground • Garou's Hideout • Hero Association Hospital • House of Takoyaki 🐙 • King's Apartment • Kuseno's Laboratory • Monster Association Headquarters • Moon • Mouse Sushi • Ninja Village • Phoenix Space • Saitama's Apartment • Shelter Nr. 7 • Smelly Lid Prison • The Mysterious Shrine • Z Police Station • Z-City Ghost Town|