Alien Groza (グローザ星系人 Gurōza Seikeijin) are cryokinetic aliens that comes from the Groza Star System. A member of the Dark Four Heavenly Kings, Grozam (グローザム Gurozamu), arrived on Earth to attack Mebius, and a second one, named Grocken (グロッケン Gurokken), is part of the Darkness Five.
Subtitle: Freezing Alien (氷結星人 Hyōketsu Uchūjin)
- Main article: Grozam
The first appearing Alien Groza, Grozam is the third member of the Dark Four Heavenly Kings to fight Ultraman Mebius. Unlike his fellow teammates who prefers psychological manipulation and trickery, Grozam resorts to brute strength and prefers face-to-face combat against the Earth's protector Ultraman Mebius. Managed to defeat the young warrior and froze him to a nearby dam, he gloated his victory over the citizens but was reminded by Mefilas not to underestimate both the Ultraman and the humanity. When Crew GUYS revived Mebius, Grozam fought the young warrior and Ultraseven and once more proven his immortality after being shattered to pieces by their attack but his underestimation for humanity bites him back when Konomi of Crew GUYS used the Maxwell Tornado and burned his pieces.
Ultraman Mebius Gaiden: Ghost Rebirth
- Main article: Grozam#Ultraman Mebius Gaiden: Ghost Rebirth
Mega Monster Battle: Ultra Galaxy Legends The Movie
Although not clearly seen, Grozam is one of the many monsters who makes up Belyudra's right arm in Mega Monster Battle: Ultra Galaxy Legends The Movie.
Ultra Zero Fight & Ultraman Retsuden
- Main article: Grocken
A human sized Alien Groza reappears in this series as an AIB agent. He, along with his colleagues watched the activities of Kei Fukuide from the AIB base. When Kei discovered them observing him, he destroyed the field agent's disguising device and compromised the mission, leading to the control panel where the alien stood to malfunction.
Ultraman Taiga The Movie: New Generation Climax
After hearing about Grimdo's eventual arrival on Earth the Villain Guild attempt one last effort before trying to escape. They had started to target Hiroyuki Kudo for his Ultraman Bracelets, intending to sell them off for a high price. Alien Shaplay, Alien Keel, Alien Serpent, Lecuum and Alien Groza attempted to mug Hiroyuki, but the aliens were defeated with combined efforts from Hiroyuki, Katsumi Minato, Isami Minato and Riku Asakura.
- Height: 2 ~ 52 m
- Weight: 200 kg ~ 20,000 t
- Origin: Groza Star System
- Powers and Weapons
- Hell Frozen Breath (ヘルフローズンブレス Heru Furōzun Buresu): Grozam can emit a cloud of quick-freezing mist from his mouth. This ice mist can be used to freeze entire lakes in just seconds and can even turn weaker energy attacks into ice, making them fall to the ground and shatter. He also claimed that he is capable of freezing the entire planet Earth within a matter of seconds.
- Ice Blast: Grozam can launch numerous, explosive blasts of solid ice from his mouth.
- Reformation: Having a body made completely of ice, Grozam is capable of quickly reforming should his body be blown to bits. This also means he has an enhanced form of regeneration, able to use his icy body to fill in large wounds and even keep him from falling apart when sliced in half.
- Ice Blade: On each of Grozam’s arms rest a long, deadly blade. These blades can also extend to sword-like lengths. Not only can he use these with great skill, but once stabbed into a victim, the blade can be broken and the victim will be frozen in ice, possibly forever.
- Freeze Pulse: Should Grozam be set on fire, he can release a quick blast of freezing air from his body, quickly dousing the flames.
- Size Change: Grozam can change his size from that of a man to that of a giant and back again. When at a human size, he will lose the spikes and blades on his body.
- Teleportation: Grozam can teleport anywhere he wishes.
Mega Monster Rush Ultra Frontier
Three Alien Grozas appear in Mega Monster Rush Ultra Frontier, one named Grrowrun, one named Groll, and one named Granzer.
Ultraman Chronicle: ZERO & GEED
Ultra Zero Fight
|Ultraman Zero Kaiju|
|Ultraman Zero The Movie: Super Deciding Fight! The Belial Galactic Empire||Alien Esmeralda Emerana | Iaron | Darkgone | Legionoid | Delust | Brigante | Two-Dimensional People | Darklops | Malebrandes | Arch Belial|
|Ultraman Zero Gaiden: Killer the Beatstar||Beatstar | Rei's Gomora | Ace Killer | Inpelaizer | King Joe | Rei's Litra (S) | Alien Bat|
|Ultraman Saga||Hyper Zetton | Alien Bat | Sphere | Gubila | Gomess (S) | Arstron | Legionoid | Chaos Header 0 | Lidorias | Bolgils | Mogrudon | Golmede | Mienin | Eligal|
|Ultra Zero Fight||Bemular | Telesdon | Gudon | Sadola | Alien Bat Gurashie | Red King | Galberos | Gan-Q | Bemstar | Pigmon Moroboshi-kun | Illusion Ultraman Zero | Alien Mefilas Sly | Alien Hipporit Jatar | Alien Temperor Villainous | Alien Groza Grocken | Alien Deathre Deathlogue | Silvergon | Fanegon People | Tyrant | Armored Darkness | Kaiser Darkness|