Godzilla is a miniseries about Godzilla fighting other monsters, or other Monsters that fight other monster that would either ally with, or fight, Godzilla.
Godzilla VS Megalon
This is basicly just just a battle between Godzilla and Megalon, which Godzilla wins and kills Megalon. It ends with Mothra Hatching from her Egg.
Rodan VS Mechagodzilla
Rodan Fights Anguirus, but the fight is interrupted when MechaG attacks; in which Anguirus is defeated, but before MechaG can finish him off; Rodan drives it off when it's wounded.
King Ghidorah VS Hedorah
King Ghidorah fights Hedorah through all of his forms, King Ghidorah gets mortally wounded, but Gigan comes in and Finishes off Hedorah.
Godzilla VS Orga
Godzilla fights Orga; having a long battle, but when Godzilla's about to kill Orga with his Plasma Ray, king Ghidorak swoops in and kills Orga, but leaves before Godzilla can attack him. Meanwhile MechaG finds Kiryu, about to have a fight.
Mechagodzilla VS Kiryu
Mechagodzilla fights Kiryu. Eventually Mechagodzilla slices it in half; killing it. MechaG then flies off.
Godzilla, Anguirus, Rodan, Mothra VS King Ghidorah, Mechagodzilla, Gigan: 4 on 3
One of the longest parts of the Miniseries. King Ghidorah, Gigan, and MechaG meet up, planning the destruction of the other Kaiju. Meanwhile, Godzilla meets with Mothra (still in her Larva form), and the duo of Rodan and Anguirus. Later, Godzilla is attacked by Mechagodzilla; with King Ghidorah and Gigan fighting the other three. Godzilla then decapitates MechaG, presuming him dead. King Ghidorah kills Anguirus; when Godzilla attacks him; leaving Gigan to take care of the other two. Eventually a lazer peirces through Godzilla and King Ghidorah, and it turns out to be Mechagodzilla. The episode ends when MechaG kills Godzilla.
Gigan VS Mechagodzilla
Gigan defeats Mothra and Rodan but spares them. Mecha G fights King Ghidorah, and kills him; in which Gigan calls MechaG a traitor and starts fighting him in a long battle. Eventually Gigan kills it and uses it's peices to revive King Ghidorah as Mecha King Ghidorah. Then it ends when they turn toward Mothra (who's in moth form) and Rodan, and Destoroyah appears.
The Final Battle
It starts with MechaKG, Gigan, and Destoroyah fighting Mothra and Rodan. Then Kyryu, who turns out to have survived it's battle with MechaG; grabs one of the pieces of MechaG, His brain, and pierces through Gigan; killing him. Then Destoroyah obliterates Kiryu and MechaG's remaining peices. Meanwhile Space Godzilla ressurects Gozilla, saying that he should be the one to kill him, not MechaG. MGK is about to kill Rodan and Mothra with Destoroyah watching, but Gozilla tackles MGK, and the his rays go at Destoroyah, but he survives and forces the blast back at Godzilla. Godzilla throws MGK at the blast, killing him. Then Godilla faces off against Destoroyah. Eventually Godzilla kills him, and the series ends with Godzilla, Mothra, and Rodan going off into the sea, and Anguirus is revealed to have lived.