Zillo Beast incident/Legends

The Zillo Beast incident took place on Coruscant during the Clone Wars. After discovering the last known Zillo Beast after the Battle of Malastare, the Galactic Republic's scientific community and Supreme Chancellor Palpatine both desired to study the beast's invulnerable scales to create impenetrable armor for the Grand Army of the Republic, and decided to study it on the Republic capital of Coruscant. Since Doctor Sionver Boll couldn't remove the Zillo Beast's scales without harming it, Palpatine ordered her to kill it. During it's execution the beast escaped and rampaged Coruscant City until it arrived at the Galactic Senate building to avenge itself on Palpatine. It was fortunately unable to, however, and was killed by a bombardment of poisonous gas from a number of LAAT/is, but not after killing and injuring a number of clone troopers and civilians. The next day they took the Zillo Beast on a lift to research it and then Palpatine ordered Dr. Sionver Boll to clone it.