Spheresaurus

is a monster that first appeared in Ultraman Decker, as well as the titular Ultra's first opponent on Earth.https://m-78.jp/decker/monster-alien/ It was also the first monster attack on said world after 7 years period of peace.
Nearing the series finale, the Sphere's progenitor, the Mother Sphere, arrives on Earth as the .
Subtitles: 
*Normal: 
*Mother: 
==Conception==
Spheresaurus was designed by Masayuki Gotoh,https://twitter.com/aws49T8EvYnPX7U/status/1546084064364441601 who was only given orders to "anyway, just make a giant monster".Figure-Oh 293 page 19 Its large body proportion is intentional on director Masayoshi Takesue's part, who wishes to introduce more original and bigger monsters in Ultraman Decker.https://news.mynavi.jp/article/20220706-2389668/2
The eco-stra New Spheresaurus was designed by , the winner of a drawing contest and later refined by Masayuki Gotoh for further cleanup.https://m-78.jp/news/post-6553 This contest was held by Japan's Toys "R" Us for children below 15 years old, with the selected winner gets to have their design represented on an acrylic merchandise.https://m-78.jp/news/post-6441 The theme for this redesign is for Spheresaurus resurrected from its fight with Ultraman Decker into mankind's ally.https://www2.toysrus.co.jp/event/10907/https://www2.toysrus.co.jp/event/10907/
Eco-stra New Spheresaurus design.png|eco-stra New Spheresaurus
==History==
===Pre-Ultraman Decker===
Formed from the Sphere Soldiers fusing into one another, the Spheresaurus is a series of monsters whose purpose is to absorb the energy of a planet which the Spheres had targeted and confined. After absorbing a significant amount of energy, it sends them to empower the Sphere Barrier and causing it to shrink even further to the planet's surface. By that point, Mother Spheresaurus would be summoned and presumably the Spheres would complete its assimilation with the targeted planet. Given that the statements were spoken by Decker Asumi, it is assumed that he had observed one such planet falling victim into those creatures, with Planet Bazdo being next on the list. 
===Ultraman Decker===
When Agams time-traveled into the distant past (a few years after the defeat of Evil Trigger), he brought the Spheres along with him. Spheresaurus was unleashed by a King Sphere to attack the spaceport at Sorafune City, where it generated root-like structures from under its feet to gather energy from the Earth for a yet-unknown reason. It used its shockwave to disable the autopiloted GUTS Falcon and Nursedessei, as well as destroying anything nearby.
Ultraman Decker appeared, having fused with Kanata Asumi when the young man was devoured by a Sphere. Decker fought off the Sphere Soldiers as he made his way towards Spheresaurus, engaging with the beast in a battle. Decker managed to destroy its frontal horn before finishing off the monster using his Selgend Beam. He then went to fight off the other Spheres in space, but was unsuccessful and fell back down to the Earth. 
Another Spheresaurus appeared in the same location a year later, sent to absorb the energy that Sphere-Neomegas left behind. Ultraman Decker appeared once again, this tome accompanied by the Terraphaser. Midway through the operation, Agams hijacked the Terraphaser and turned against Decker, defeating him. Decker Asumi came from the future and took back the Ultra D Flasher, transforming into Ultraman Decker to fight against both opponents and used his three Dimension Card Monsters Miclas, Agira and Windom to hold down Spheresaurus, but the three of them were blown away by Terraphaser using Eleking's power. Once Kanata acquired Dynamic Type, he defeated Spheresaurus by slicing it apart with the Decker Shield Calibur's Decker Flash Dynamic. 
A Spheresaurus was summoned from the future by Sphere-Geomos by using its S-Plasma engine to generate a hole in space and time. Spheresaurus continued to gather energy from the Earth in order to make the Sphere Barrier shrink and destroy the planet, but Kanata was unable to transform because of his wavering resolve to fight, having heard that humans brought the Spheres to Agams' home of Planet Bazdo and thus caused its ruin. GUTS-Select was also unable to defeat Spheresaurus because of Sphere-Geomos' overwhelming powers. After an initial defeat, they had come up with a plan to use the remaining S-Plasma energy to shoot through both monsters but once the plan was put into practice, Sphere-Geomos placed a barrier in front of itself, reflecting the Nurse Cannon's beam to Spheresaurus. Sphere-Geomos then absorbed the Spheresaurus' corpse as energy and was about to summon another one, but the Spheresaurus was destroyed by Ultraman Dyna before it could emerge from the portal. 
The Mother Sphere emerged from a wormhole when Agams commanded the Terraphaser to cause the Spheres to form Sphere Obelisks. Taking the form of Mother Spheresaurus, the creature fought Ultraman Trigger, who failed to defeat her even with the power of Glitter Trigger Eternity. Following Agams and Kanata's final battle, the Sphere Barrier surrounding Earth was broken with the destruction of the Sphere Obelisks, but Trigger and the Mother Spheresaurus descended on the Earth immediately afterwards. The monster defeated both Ultras and severely damaged the Terraphaser, killing Agams inside it before proceeding to drain the energy of the Eternity Core from beyond space-time, managing to recreate the Sphere Barrier once again. After regrouping within the downed Nursedessei, GUTS-Select and Kengo had to come up with a plan - Operation T/D/Ghttps://twitter.com/hiroki329_staff/status/1617505960054116352 - to defeat Mother Spheresaurus, finding out about its weak point, the core on its chest, from data left behind in the Phase Riser. Challenging Mother Spheresaurus again, Kengo transformed into Glitter Trigger Eternity to forcefully drain the Eternity Core energy that Mother Spheresaurus had absorbed, transferring that power to Kanata so that he could transform into Ultraman Decker, who then fought the Mother Spheresaurus with the remaining arsenal of GUTS-Select. 
Mother Spheresaurus then unleashed a horde of Spheres to absorb everything within the vicinity, stating its intentions to become one with all life to remove all sadness and conflict, but Kanata and the others rejected its will, stating that they will take their own futures for themselves. Using all of his energy, Decker fired his Selgend Beam through Mother Spheresaurus' core, destroying the monster once and for all. With the Mother Sphere defeated, the remaining Spheres and the Sphere Barrier finally disappeared as well, reconnecting communications between Earth and space as the people from Mars started to return. 
====Trivia====
*Voice actor: Sayaka Ohara (Mother Spheresaurus)
*Suit actor: Shun Takahashi
*Spheresaurus' roars are modified Orga roars mixed with Darambia's roars.
*Despite being created by the Spheres, Spheresaurus is not considered as a Sphere Synthetic Monster, with that honor goes to Sphere-Gomora as the first appearance of such breed two episodes later.フィギュア王 No.295 page 18
*While GUTS-Select were planning for attacking the Sphere monsters with Nursedessei, an origami foldout of Spheresaurus was among those seen on the table. It was made by Yuta Imai, who also shares the method off-camera to Hiroki Matsumoto, Kanata's actor.https://twitter.com/origami_maimai/status/1601394422570049536https://twitter.com/hiroki329_staff/status/1601371067846492160
*Mother Spheresaurus's height and weight are a pun in goroawase, as 88 can be read in Japanese as haha, or mother.
==Data==
==Merchandise==
Spheresaurus.jpg
MotherSpheresaurusToy.png
==Gallery==
===Ultraman Decker===
:;Spheresaurus
Spheresaurus summoned.png|Spheresaurus being summoned
Spheresaurus in Decker.png
Spheresaurus in Decker 0.png
Spheresaurus in Decker 1.png
Spheresaurus unleashes shockwave.png
Spheresaurus in Decker 2.png
Decker Flash punching Spheresaurus.jpg
:;Mother Spheresaurus
Mother Spheresaurus kodansha.png
Mother Spheresaurus kodansha 1.png
MotherSpheresaurusFront.jpg
Mother Spheresaurus.jpg
Spheresaurus HD 001.png
Spheresaurus HD 002.png
===Miscellaneous===
MDC Spheresaurus.png|Mons Dimension Card
Mother Spheresaurus left-removebg.png
Mother Spheresaurus back-removebg.png
Mother Spheresaurus right-removebg.png
==References==
Category:Fusions
Category:Kaiju That Defeated Ultras