Manda (マンダ Manda) is a sea dragon kaiju who first appeared in the 1963 Toho film Atragon. In his debut film, Manda was the guardian of the undersea empire of Mu, and was unleashed to destroy the Gotengo before it could breach the heart of Mu. The second incarnation of Manda introduced in Destroy All Monsters was one of the monsters contained on Monsterland by the end of the 20th century, and was unleashed to attack Tokyo under the command of the Kilaak invaders. After the aliens' control of the monsters was severed, Manda was present at Mount Fuji when Godzilla and the other monsters battled King Ghidorah. Manda made a brief appearance in Godzilla: Final Wars as well, once again battling the Gotengo underwater.
It is present day, 25 years after 1999 when the monsters of Monsterland thwarted their last encounter with the space monster King Ghidorah. And after World War II's nuclear warfare had awakened giant monsters from beneath the Earth. Instead of raging war against each other, Mankind united to kill the monsters and avenge the lives of millions in their wrath. Soon after, man was faced with an even larger threat, Aliens. Races of superior beings hellhent on world domination, Man's forces now rely on their powerful giant monsters to save the Earth from anything that threatens to destroy it. One such is the King of the Monsters, the second last surviving member of its kind who first appeared in 1955. Before, he menaced the entirety of Japan but unlike his brethren from 1954 he became an ally to humanity, the hope for a safe and secure future. His name is Godzilla.
