(Under the Pacific Ocean, near Hawaii)
Amblygon wondered what that green glow coming from Zilla Jrs mate [codename: Aurora] was. Her eyes eventually flashed with purple light, then she fired a light purple fiery breath at Amblygon, the breath was light purple by the edge, but the middle was pure white. it hits Amblygon, he immediately screeches out in pain, the skin on his left arm is burnt and nearly shredded. He had moved at the last minute otherwise, it would've hit him in the stomach, and would've done alot more damage. He screeches at her. She used most of her nuclear reserves in that breath, and it would take a while for her to charge a normal beam let alone a full powered one. She bellows out to Zilla Jr calling him for help, as she has no other option because she is outmatched by Amblygon in strength. Amblygon recognises her call, and decides that he has to take her out quickly. He quickly sprays his acidic breath on her, burning her leg and lower abdomen. As she roars out In pain, he tackles her an knocks her unconscious. He quickly swims away as fast he can, to continue his mission of revenge.
(15 minutes later)
Zilla Jr arrives at the scene. He sees his unconscious mate and hisdestroyed eggs. He wakes up his mate. Godzilla arrives at the scene only now, because Zilla Jr is faster than Godzilla and Godzilla is still tired and injured from his battle with the MUTOs. Godzilla says that he will go out and kill Amblygon, but Zilla Jr refuses saying he shall go out, to avenge his mate and so that Godzilla would take more time to heal from his wounds. Zilla Jr roars out as loud as he can to Amblygon, challenging him to a fight now. Amblygon hears this and accepts...
So yeah your probably wondering how Godzilla knows Zilla Jr, here how:
So thats a summary. So in the Permian time, Zillas werent the strongest kaiju, however, they were the fastest on land. They were usually seen as water dwelling pests who eat fish and occasionally come on land. They would scavenge on remains of other kaiju they found. They were related to Gojirass somewhat but were nothing like them. There was a subspecies of Zillas that were larger (150-210 ft for females, 170-255 for males. 30 000-60 000 tons opposed to the 120-150 ft for Zillas), stronger, faster, smarter, werent asexual, had atomic breath (green for males, purple for females), didnt have to eat fish, and were basically better in every way. They were more closely related to Gojiras, however they were very rare, 1 out of 1 000 000 000 egg hatches would become these subspecies. Zillas were basically natures attempt to counterfeit Gojiras, but it had ended worse than expected, so they were hated by Gojiras. When Godzilla was a child, he too didnt like Zillas, as they would often bother him and his family. One day he was out with his father, teaching him to use his atomic breath when a Zilla child his age came by. He and his father noticed it was different. Instead of bothering them like usual Zillas, it had bowed its head in respect to Godzillas father, which was surprising. Godzilla then immediately knew that this Zilla was one of the subspecies. He told his father, who knew this too. This kaiju was Zilla Jr! Zilla Jr told them about how his parent had abandoned him and how he had been seen as an outcast by other Zillas. Since he was part of the subspecies, he charged up his atomic breath and shot it at a nearby rock. He then along with Godzillas father, gave him tips on how to focus his energy into a beam. From then on, Zilla Jr was raised with Godzilla, and became somewhat a brother to Godzilla. They had been friends, until the Permian Extinction. They had been separated by this and had each presumed one another was dead. Then millions of years later, 2014, Godzillas retreats to the bottom of the ocean after fighting the MUTOs. He recognises a scent of another kaiju, one that is familiar. When he reaches there, he sees 2 Zillas. He roars at them. The bigger, male roars back. Godzilla approaches them and sees that it is Zilla Jr andAurora (Zilla Jrs mate). They then reunite.