MukuMuku and Makunosaurus were the 18th and 19th Kaiju to appear in Ep.19 of the Fireman TV series, The Space Monster vs. The Primeval Monster.

_Bio and Abilities_
MukuMuku was an Alien that came from the Super Gravity Star and was in fact far smaller in size when he first arrived. He Befriended a Human Child, but the Alien began to grow in size until it became a Kaiju due to its exposure to Earth's Gravity – MukuMuku's world has considerable Gravity, which keeps him small; fortunately, he was vegetarian and among the few Friendly Kaiju in the series; He help Fireman fight Makunosaurus, the other Kaiju in the episode. MukuMuku resemble a Koala, light brown, covered in fur and big ears, with five digits hands. It's only abilities were physical combat. MukuMuku communicated through wines and moans.

Due to its more friendlier outlook, compare to most of the Tsuburuya Kaiju, MukuMuku has been used in other Media in the last 20 plus years; In 1999, he was among the ranks of Cute Kaiju with Booska, Pigmon & Kanegon in a 1 minute Toy Infomercial presented by Ultraman Nice. In 2019, MukuMuku was given a Twitter Account. In 2020, MukuMuku joined Fireman, Jumborg Ace, Mirrorman, and the Ultramans Zoffy, Ace and Ginga Victoy as a member of a Galactic Federation for a Stage Show.

Makunosaurus was the 2nd other Kaiju and principle Monster Antagonist in the Episode that Fireman and MukuMuku fought to protect a village from. Makunosaurus could breath both Fire and Fog from the Mouth and Powerful Kicks. He was one of the many Kaiju design from a modified suit, in his case Dorango, from Ep.13, albeit with the back legs removed and horns and spikes added, and repainted grey. It's Roar was likely from Barugon's of the Gamera Series.

The Makunosaurus was among the few Kaiju to be killed without the need of Fireman's special's powers, but just died after been weaken from the fight.

_History_
Kenta, a very active but at times trouble making child, runs into the Forest after causing a stir at home, where his father works as a driver; At night, he finds a small UFO in front of his hideout; in it he discovers a small Koala like Alien sleeping, and takes with him. After a Full Night sleep, and with a search Party looking for him, among them Misaki, Kenta wakes up to find his new Alien Friend has grown in size of a Human beign, as he runs from the cabin, the Alien has another Growth Spurt and goes from Human size to a full Blown Giant Kaiju in an instant – despite the shock of it, Kenta discovers the creature to be docile and names him MukuMuku.

Later he is found by the search party and is reprimanded by his father – at that moment, Misaki gets a call from Umino of a new Kaiju that appear in Tokyo Bay: SAF confronts the Monster, Makunosaurus, as it makes landfall and attacks a fishing village, Misaki arrives and Transforms into Fireman and Battle the Monster, but in the end the Makunosaurus uses its Fog Breath and disappear.

The Beast continues its travel up North, now heading to Ashikaga, Kenta's village, where an evacuation order is issue for the inhabitants, meanwhile Kenta carries a large basket of Vegetables to feed MukuMuku, where he sees the Alien seeks to fly his spacecraft and return home, but can't due to his now Giant Size. In that moment, the Makunosaurus appears, been dogged by the Marigon; MukuMuku decides to fight the Beast to protect his friend's Village, but the brave cuddly fella is no match for the Fire Breathing Lizard alone. Misaki finds and takes Kenta to a safe location, then returns and transforms into Fireman to help out the Friendly Kaiju.

The Two Giants team up against the Monster; Fireman providing most of the physical attacks, while MukuMuku holds the Beast in place by grabbing its tail and giving a few kicks it. Fireman in the end grabs the tired Beast and tosses it; Makunosaurus stands up to make one last roar, but falls and dies on the spot – MukuMuku jumps in joy for the victory. Fireman then walks to him to thank him and with his powers, reverts the Gentle Alien to his original size.

Afterwards, SAF is able to repair his ship and Kenta bids farewell to MukuMuku before he takes off to his Home world. Later, playing with his friends, Kenta looks to the sky thinking of MukuMuku.