Goomba (Super Mario Bros. film)

Goombas are Dinohattanites which have been devolved into this form.

Biology
Goombas have tiny saurian heads on disproportionately large bodies. They have brown scales, green/yellow eyes with no irises and fang-like teeth. Their heads are either round, snake-like, or raptor-like, depending on their dinosaur ancestry. While they have enhanced strength and make very loyal soldiers, they are also known to have low intelligence and can be easily distracted.

History
Goombas were once Dinohattanites, a species of strikingly Human-like reptilians from an alternate dimension populated by dinosaurs transported after the asteroid impact 66 million years ago. As the dimension deteriorated due to its resources being exhausted, the King placed General Koopa in charge of energy conservation, although Koopa took the opportunity to research and develop de-evolution technology, eventually launching a coup against the King, de-evolving the King into a giant, sapient fungus and slaughtering most of the King's supporters, including the Portal Guardians, a religious organization dedicated to protecting the remains of the meteor and a portal to Earth generated by its energy. Goombas were presumably made from dissidents, monarchy loyalists, and Portal Guardians, de-evolved just far enough to make them humanoid dinosaurs.

As Goombas, they soon made up Koopa's military force, clad in red coats and often wielding fireball guns, receiving training from the police force. As Koopa continued his rule, remodeling the capital city after the Human city of Manhattan and renaming it to Dinohattan, the King, still a fungus, spread across the city to prevent its crumbling infrastructure from being rebuilt, creating more dissent against Koopa's rule. Koopa retaliated by imprisoning any dissident and converting them to Goombas. In the 1990s, Daisy, a Dinohattanite living on Earth as a Human and the daughter of the King, was captured by Koopa's dimwitted cousins, Iggy and Spike, and brought to Dinohattan. Mario Mario and Luigi Mario, two Human plumbers from Brooklyn, chased after her, silently stalked by a Goomba when they arrived in Dinohattan. Daisy was taken by Goombas to a cell in the Goomba barracks of Koopa's tower, where other Human girls that Iggy and Spike mistakenly kidnapped before finding Daisy were also held. Meanwhile, the Marios were arrested alongside a dissident known as Toad, as the brothers supposedly had the meteorite shard that Daisy carried prior to her capture, capable of merging Earth and Dinohattan. Unbeknownst to Koopa, the shard was stolen from the brothers by another Dinohattanite named Big Bertha. Nevertheless, Koopa had the brothers questioned, then personally took them to a de-evolution chamber alongside Toad.

Toad was put into the de-evolution chair as he continued to shout dissent against Koopa, and was de-evolved into a Goomba, promptly being fitted with a harmonica and moved to join the ranks of other Goombas. The brothers manage to escape Koopa, who sends Iggy and Spike out to capture them, reversing the de-evolution device's settings to have it make them somewhat more intelligent. They chased the Marios out to the Koopahari Desert, but were captured by the brothers, and agreed to exchange the meteorite shard for Daisy. The brothers, now with Iggy and Spike, return to Dinohattan, where Iggy and Spike are captured for dissent and the Marios lose the shard to Lena, Koopa's lover, but still move out and enter Koopa's tower to find Daisy. In an elevator, the Marios hide behind oblivious Goombas, and manage to gently rock the Goombas to the elevator music, making them dance and distracting them. The Marios escape the elevator as a higher ranking Goomba enters and orders the others to stop dancing. Meanwhile, Toad, still a Goomba, had been assigned to Daisy, and offered her meat dinner, although Daisy responds that she is a vegetarian. After Toad leaves to get vegetables, Lena enters Daisy's room and attempts to kill her, but Daisy escapes with the help of Yoshi, a non-sapient pet dinosaur.

Daisy runs into Toad again, who had brought her steamed vegetables, but also runs into Iggy and Spike, being led away by other Goombas to be executed. The other Goombas see that Daisy had escaped, pulling their fireball guns on her, but miss and hit Toad. Daisy manages to put out Toad with a fire extinguisher and escape with Iggy and Spike, who claim to be her most loyal supporters, soon meeting up with Mario and Luigi in Devo Chamber 4, where the main fungal mass of the King was kept. Lena, with the meteorite shard, decides to merge the dimensions herself, prompting Koopa to put out an arrest warrant for her. While heading out with a squad of Goombas, they run into Luigi and Daisy, capturing them, soon being joined by Lena, who had been captured by the police chief. Koopa takes possession of the shard and orders the Goomba army to organize for invasion, having them armed with handheld de-evolution guns. Meanwhile, Mario, on the directions of Daisy, went to the Goomba barracks to rescue the other Human girls, fighting off Goomba guards and escaping on a mattress through a frozen pipe. Two Goombas chased Mario and the girls, down the pipe as well, but were stopped by a wrench Mario put in a hole in the pipe, flipping the mattress the Goombas were using. While they managed to keep sliding using their own bodies, they were unable to reach Mario in time, and Mario's mattress flies out of the pipe. Koopa, Lena, Luigi, Daisy, and the other Goombas had just exited the tower, right in the path of the mattress. While Koopa manages to get out of the way, the Goombas are all bowled over by the mattress as Mario and the other girls jump off.

While Koopa and Mario battle, the Human girls escape back to Earth through the meteorite chamber's portal, and Lena takes the shard, managing to merge the dimensions at the cost of her own life. As Luigi and Daisy worked to remove the shard, the dimensions began to merge, with Mario, Koopa, and many Goombas being transported to Manhattan as Dinohattanite structures began merging with their Earth counterparts. Koopa took a de-evolution gun from the Goombas, and fired it on Mario, but missed and hit Anthony Scapelli, a plumbing and construction mogul, de-evolving him into an ape. Mario uses a mushroom taken from the King's mass to block the next shot as the Goombas stood by, but before Koopa could order them to attack, the shard is removed, returning them all to Dinohattan. Koopa ordered the other Goombas with him to attack Mario, but Toad, who had made his way down and now wanted to help Daisy, played his harmonica, making the other Goombas dance instead. Angered, Koopa knocked them all down with a single punch. They remained down while Mario and Luigi got ahold of de-evolution guns from Toad and blasted Koopa, de-evolving him into a t-rex while a Bob-omb that Mario had previously sent after Koopa went off, sending Koopa into a vat over the street. The brothers manage to de-evolve Koopa into primordial slime before he could attack, effectively killing him. The other Dinohattanites, including Toad, rejoice. It is unknown what became of the Goombas afterwards, although it is very likely that they were restored to their Dinohattanite form by the reversed settings on the de-evolution technology, like the King.