Gatchan, formally named Gadzilla Norimaki, originated as a cherub-like entity hatching from an egg discovered by Senbei Norimaki during a time-travel expedition to the Stone Age. This green-haired, winged being initially appeared singular. Created by the God of the Galaxy (Kami-sama) to hinder human technological progress by devouring metal resources and preserving Earth's primitive peace, Gatchan consumes nearly any material, preferring metal and rejecting rubber. Senbei’s intervention in relocating the egg from prehistoric times caused this divine mission to fail. After a massive consumption episode, Gatchan encased itself in a cocoon and emerged two weeks later as two identical entities, known as the Gatchans or Gatchan #1 and #2. This replication ability appears ongoing, with depictions suggesting up to eight Gatchans in potential futures. Gatchan communicates through unique sounds ("Pipokupipo," "Koo pee pee poo"), understood only by Arale Norimaki and later Turbo Norimaki. Lacking defined gender characteristics and initially assumed female by Arale, the series typically uses male pronouns. Abilities include flight using wings, projecting an energy-based Antenna Beam from head antennae used defensively and in combat, and transforming into a Super Saiyan-like form in video games. The Antenna Beam notably aided Arale against antagonists like General Tao and General Blue in *Dragon Ball* crossovers. Observing Gatchan’s integration into the Norimaki family and contentment in Penguin Village, the God of the Galaxy abandoned plans to destroy humanity, underscoring a shift from divine mandate to familial bonds. In spin-offs and crossovers, especially within *Dragon Ball*, the Gatchans appear as Arale’s consistent companions. They assist in battles, consume metallic structures like vehicles and buildings, and demonstrate combat abilities against the Red Ribbon Army and in the film *Dragon Ball: Mystical Adventure*. Their role extends to video games (*Dragon Ball Z: Budokai Tenkaichi 3*, *J-Stars Victory Vs*), supporting Arale in attacks. The name "Gadzilla" came from Arale’s amalgamation of "Gamera" and "Godzilla" (Gojira), though "Gatchan" became common. Design inspiration stemmed from Akira Toriyama’s desire for a household pet, refined using elements from his earlier rejected work *Ageha Town Observation Diary* and his sister’s newborn child. Gatchan’s character embodies innocence and loyalty, mirroring Arale’s playful demeanor while contributing to themes of unintended consequences and familial acceptance across *Dr. Slump* and *Dragon Ball*.