|Home world:||Planet Earth, Deep Sea|
|First appearance:||Mirrorman Episode 20 "Bodyguard from the Deep"|
|Latest appearance:||Mirror Fight Episode 35 "Laugh in Revenge!"|
Sphenodon (スフェノドン Spenodun) was a kaiju that appeared in the TV Series: Mirrorman. He appeared in Episode 20.
Subtitle: Deep Sea Monster (深海怪獣, Shinkai Kaijū)
- Height: 65 m
- Weight: 20,000 t
Sphenodon was a large kind of lizard that was supposed to be extinct in ancient times. In the present day, a single member manipulated by the Invaders was causing destruction at sea, sinking seven ships. The military and SGM failed to stop the kaiju, and it even destroyed their underwater submarine base. Kyotaro transformed into Mirrorman and after a short fight, killed it with the Silver Cross.
- Sphenodon is a reused Gokinezula suit.
- Sphenodon's roar is a reused Gabura roar.
- Sphenodon could potentially be named after the lizard genus of the same name.
Powers and Weapons
- Adapt Swimmer: Being an aquatic monster, Sphenodon can swim at moderate speeds.
|Mirrorman Kaiju & Seijin|
|Iron | Kitty Fire | Darkron | Multi | Noppera-bō | Inbera | Kitty Fire II | Gold Satan | Iron II | Multi II | Invaders | Gravity Machine | Zailas | Shinjuku Rose | Gold Satan II | Noah | King Zaiger | Iron III | Kitty Fire III | Zailas II | Jabala | Kinder | Chamelegon | Aroza | Big Eye | Sphenodon | Darkron II | Taigan | King Wonder | Androsaurus | Coldon | Haebun | Gokibura | Mothgojira | Dustpan | Snake King | Harigojira | Killergon | Gorgosaurus | Mayasaurus | Arigeida | Killersaurus | Pair-Mons King | MoleKing | Smoke Ness | Pair-Mons King β | Gorgosaurus β | Mayasaurus β | Halley Jack | Androsaurus II | Androsaurus Jr. | Magumagon | Zangani | Shadow Mons | Teroringa | Invesaurus | Ghost | Boasaurus | Black Gon | Red Mons | Giranda | Borezaurus II | Iezu | Eletrikzaurus | Dead King|
|Mirror Fight Kaiju & Seijin|
|Mirror Fight||Iron | Kitty Fire | Darkron | Noah | Aroza | Zailas | Multi | Inbera | Kitty Fire II | Gold Satan | Iron II | Multi II | Gravity Machine | The Invaders | Gold Satan II | Korudon | King Zaiger | Jabala | Kinder | Chamelegon | Sphenodon | Darkron II | Taigan | Ozma | Big Eye | King Wonder | Andro Zaurus | Dustpan | Snake King | Harigojira | Kiragon | Arigeida | Sea Killersaurus | Pair-Mons King | Gorgosaurus β | MoleKing | Invesaurus | Shadow Mons | Eletrikzaurus | Dead King | Borezaurus | Teroringa|
|Mirror Fight 2012||Alien Reguran | Iaron | Dorigorus | Dorako | Aroza|