Godzilla Jr.

Godzilla Junior (ゴジラジュニア, 'Gojira Jyunia'), also known as Baby and Little One, is the adoptive son of Godzilla featured in the later movies of the Heisei Series. Miki Saegusa acted as a mother figure to him in the first film. He had the longest screen time for a kaiju in any Godzilla film for almost the entire film in Godzilla vs. Mechagodzilla II.

Baby Godzilla

Baby Godzilla's (ベビーゴジラ, 'Bebii Gojira') first appearance was in the 1993 film Godzilla vs. MechaGodzilla II. Baby Godzilla's egg was found on Adona Island with a Rodan's egg. The Rodan egg hatched and looked after the unhatched egg. Godzilla himself looked to have interest in the egg. But Rodan fought Godzilla to protect the egg but failed. However, scientists took the egg during the fight. Godzilla then went to Japan to get the egg while Rodan woke up and turned into Fire Rodan and went to claim what was his. The egg hatched and much to the scientists surprise, it was an infant Godzilla and found out that it has a second brain in its ribs. This made the scientists know Godzilla must have a second brain as well. So they created a Mechagodzilla to kill Godzilla. But Rodan comes in his fire form to fight Mechagodzilla and fought well but failed. Godzilla fights Mechagodzilla and wins. But the scientists upgraded Mechagodzilla into Super Mechagodzilla and succeeds to destroying Godzilla's second brain. Godzilla seemed to have died but listening to Baby Godzilla's cry Fire Rodan gave up his life essence to Godzilla and disappears. A newly revived Godzilla destroys Mechagodzilla with his sprial ray. Baby Godzilla and his new father swim off to sea to find a new home.

Little Godzilla

In Godzilla vs. SpaceGodzilla, Baby Godzilla grew into Little Godzilla (リトルゴジラ, 'Ritoru Gojira') in his new home Birth Island. SpaceGodzilla trapped him in a crystal prison until his father Godzilla killed Spacegodzilla. Little Godzilla was also seen having the ability to breath radioactive "bubble" breath similar to minya's smoke rings. Little Godzilla is not anything like his father/mother because he is not mature enough.

Godzilla Junior

Godzilla Jr. In Godzilla Vs. Destoroyah Godzilla's melt-down destroyed Birth Island. Little Godzilla is missing and presumed dead. He is finally found, much bigger and half the size of Godzilla and is now called Godzilla Junior. Miki lured him to Destoroyah to have Godzilla so Destoryah could stop Godzilla's melt-down. Godzilla Junior found Destoroyah but is knocked down by the monster and Destoroyah puts it's inner jaws into Junior's chest causing lots of blood to come out and absorbing his blood and injecting micro-oxygen in his chest. Junior however, is able to blast Destoroyah with his atomic ray at close,sending the giant crab plummeting into a nearby building where it is engulfed in flames . Godzilla arrives and the two greet each other. However, Destoroyah in it's final form, topples Godzilla and grabs Junior, dropping in a building and nearly kills him. Saegusa and Godzilla were very heartbroken for the death of Godzilla Junior, as they both knew another kaiju will die: Godzilla. Godzilla succeeds in destroying Destoroyah and melts down radiation filled to skies of Japan turning it into a ghost city, but the radiation disappears and there rose Junior all grown-up and fully developed into an adult Godzilla and roars, showing that Godzilla's legacy will never end.