Zillo Beast/Legends

The Zillo Beast was a semi-sentient reptilian species endemic to the planet Malastare. In ancient times, these gargantuan creatures preyed on the native indigenous Dugs. However, the Dugs gradually gained the upper hand and slowly eradicated the Zillo Beasts through various means including drilling for fuel in their habitats. By the time of the Clone Wars, it was widely believed that the creatures were extinct though it was rumored that at least one had survived.

During the Battle of Malastare, the Galactic Republic deployed an electro-proton bomb which immobilized a substantial Separatist invasion force of battle droids. However, its tremors inadvertently awakened the Zillo Beast which went on a destructive rampage. Fearing an apocalypse, the Dugs demanded that the Republic exterminate the beast which the latter reluctantly agreed. Seeking to obtain the creature for scientific research, Supreme Chancellor Palpatine and Jedi Knight Anakin Skywalker covertly arranged for the beast to be immobilized by a stun tank which would appear to kill it.

This action succeeded in both rendering the Zillo Beast unconscious and appeasing the Dugs who believed it to be dead. In return, the Dug Council and the Republic ratified a Treaty of Malastare that allowed the Republic access to the planet's fuel reserves. The Zillo Beast was shipped to the galactic capital Coruscant for scientific study but escaped after arrival, putting the lives of millions of residents at risk and forcing the Jedi into action.

Characteristics
The Zillo Beasts were gargantuan creatures that dwarfed most other objects (roughly 100 meters long) including landspeeders and other living organisms in both size and mass. They had a roughly serpentine body with a long tail that trailed behind its form. It uniquely possessed a third arm protruding from its back. Its plate-like armor was highly impervious to explosives, blasterfire and even lightsaber strikes.

Despite these advantages, one flaw in its protective armor was a small unprotected gap between the plates which allowed some attacks to penetrate and harm the creature. On one occasion, this gap gave enough space for a well-placed energy beam from a stun tank to incapacitate the beast; rendering it unconscious. Another weakness was Malastare fuel contained a poison that was very toxic to the Zillo Beast, being one of the very few things that can actually kill one.

The eyes of the Zillo beast glowed a pale yellow-green at all times.

Unlike most, the Zillo beast's nostrils seemed to be located on the top of it's skull.

It appeared to have some form of rudimentary intellect, capable of recognizing facial features when hunting for Palpatine, and also capable of recognizing the intent behind words, even though it likely could not understand their precise meaning. It also has a sense of vengence, as it tore its way through Coruscant simply to find and kill Palpatine, who had ordered it be killed.

History
The Zillo Beasts were once the dominant species of the planet Malastare and preyed on the indigenous sapient Dugs in ancient times. Over time, the Dugs began drilling their world for fuel which gradually culminated in the near extinction of the species due to a loss of habitat. The ancient Dugs were known to have cataloged a list of weaknesses in the creatures, including their vulnerability to fuel, which was flammable.

Eventually, it was believed that the species had been eradicated, though it was prophesied that one such creature still survived and would emerge in the future to destroy them. Thus, the Dugs passed down a manuscript through the generations in order to prepare their descendants for such a day. During the Clone Wars, Malastare faced the threat of a Separatist invasion in 22 BBY which sought access to its substantial fuel reserves.

In response, the Galactic Republic dispatched a sizeable army of Clone troopers to secure the key Republic world's fuel reserves and to recruit the Dugs as allies. This mission was overseen by the Jedi Order which sent Jedi Master Mace Windu and Jedi Knight Anakin Skywalker to lead the campaign. However, the sheer number of battle droids on the planet led to Supreme Chancellor Palpatine authorizing the deployment of a new weapon&mdash;the electro-proton bomb. The weapon successfully obliterated the droid army but awakened the last remaining Zillo Beast, which wreaked havoc on the battlefield.

Panicked, the Dugs made preparations to slay the creature and demanded that the Republic assist them. Otherwise, Malastare would not ratify the treaty that would allow its fuel reserves to be used for the war effort. However, Master Windu refused to support this action, as he regarded this as the murder of an innocent life-form. Despite his protestations, the Chancellor publicly supported the action, but secretly sought to capture the beast alive for scientific research.

A scientific adviser close to him intended to study the Zillo Beast's impervious hide. At the suggestion of Skywalker, Palpatine agreed to conduct an elaborate attack designed to stun the Zillo Beast using particle cannon fire, which would penetrate the gaps in its armor and render it unconscious. Once stunned, the Zillo Beast would appear dead enough to appease the Dugs and allow for the signing of the treaty. Once in a coma, the creature was to be transported to an undisclosed peaceful world in the Outer Rim.

However, the Dugs were already prepared to slay the creature and began dumping fuel into the pit where it was located in order to kill it. This act only agitated the beast to emerge from its pit and it wrecked untold devastation on both the Dugs and Republic forces. However, the use of the Stun tank's power beam enabled the Jedi to knock out the creature.

With the treaty signed, the Zillo Beast's body awaited transportation but Chancellor Palpatine ordered a change in plans. Instead of being taken to its secret Outer Rim destination, the scientists wanted the specimen studied in a contained environment. Thus, it was agreed for the creature to be taken to the galactic capital Coruscant, where preparations were made for its arrival.

After the Zillo Beast was transported to Coruscant, it was studied on by Dr. Sionver Boll. Chancellor Palpatine overlooked the operation, and he ordered the doctor to kill it, so that they could extract the beast's scales for study. Seeing this from its prison, the Zillo Beast growled fiercely and glared at the Chancellor in rage. The doctor reluctantly accepted and produced gas from Malastarian fuel, which had, according to the Dugs, already been sucessfully used to subdue, and even kill Zillo Beasts. As it was sprayed with the gas, the Zillo Beast again became irritated at exposure to the gas, and managed to break out of its restriants, and then escaped the building in which it had been held. It rampaged around Coruscant, killing at least hundreds of innocents before charging towards the Senate, intent on revenging itself upon Palpatine for ordering its execution. While it eventually got the Chancellor's ship in its grasp, thanks to Anakin Skywalker, Palpatine escaped. The beast was killed by the Republic working with the Jedi, using flares to make it roar so missiles full of the poison could be shot into its mouth. The monster's huge body finally toppled off the Senate Building dead, paying the ultimate price for the mistakes of Palpatine and others in power. After its death, the Zillo Beast's body was sent back to the Doctor with her new orders: clone the Zillo Beast.

Behind the scenes
The Zillo Beast first premiered in "The Zillo Beast", an episode in the second season of the The Clone Wars television series. The Zillo Beast is Dave Filoni's homage to the Godzilla films. Dave Filoni also says that the beast knows Palpatine is evil.

Notes and references
Zillo-Bestie Bestia de Zillo Zillo Beast