In every episodes, Takeshi would create monsters based on daily frustrations, mostly for getting revenge on misfortune, petty grudges, or punishing humanity.
To fight against larger monsters and resolve situations that are massive in size, Gridman receives the upgrade program P-L6806OX (the downside of this program is that it lasts for 10 minutes as it could overload Junk's system - when the power up begins to fade, a blue light on Gridman's head begins to blink as a warning) for the purpose of enlargement.
Lacking a physical body, he receives one based on Ippei's drawing of a superhero and can only move from Junk when the Access Code (アクセスコード, Akusesu Kōdo) "GRIDMAN" is entered.
His left hand is armed with the Gran Acceptor (グランアクセプター, Guran Akuseputā), through which he can fire Spark Beam (スパークビーム, Supāku Bīmu), conjure the Grid Light Saber (グリッドライトセイバー, Guriddo Raito Seibā) energy sword and execute his finisher, Grid Beam (グリッドビーム, Guriddo Bīmu).
The Fixer Beam (フィクサービーム, Fikusā Bīmu) from his chest repairs the damages done by monsters created by Takeshi and Kahn Digifier.
In the series' finale, Gridman executes Grid Hyper Beam (グリッドハイパービーム, Guriddo Haipā Bīmu) which was created by Takeshi to put an end to Kahn and simultaneously destroy his personal computer.
In the series' final episode, Kahn Digifer's intrusion into Junk's Computer World causes all of the Assist Weapons to be destroyed.
In Gridman the Hyper Agent: The Overlord's Counterattack photo novel, components of God Zenon and Dyna Dragon were restored for the battle against Neo Kahn Digifer and his monsters.
The character however appears in the event anime Denkou Choujin Gridman: boys invent great heroes, taking place where digital monsters that Takeshi and Kahn previously created were brought to life as illusions that wreak havoc upon the real world.
He later upgrades himself into Gigantic Kahn Digifer (巨大カーンデジファー, Kyodai Kān Dejifā) for his final battle with Gridman, most of the Assist Weapons and overwhelming him.