Rebirth of Mothra II stars Sayaka Yamaguchi, Megumi Kobayashi, Aki Hano, and Hikari Mitsushima, and was the final tokusatsu film to feature special effects directed by Koichi Kawakita.

Along the way, the Elias tell the children the source of the Barem is a monster called Dagahra, which Nirai Kanai created to manage pollution, before it went rogue.

Moll and Lora call Mothra, who nearly succeeds in defeating Dagahra until the sea monster takes the battle underwater and incapacitates her with more Barem.

In the process, the latter group inadvertently unlock a gateway and awaken the princess of Nirai Kanai, who tells the Elias sisters that Earth must be protected and saved, the children are the hope of future generations, and reveals Ghogo is the lost treasure.

As the temple starts to collapse, Moll and Lora fly to safety on their pet miniature Mothra, Fairy, while Belvera relinquishes control of the fishermen, who help the children escape.