Ripper Roo

Ripper Roo was a kangaroo mutant rapid which served as Cortex's scout on the Wumpa Archipelago. Ripper Roo's mind was driven mad from the experiments, and Ripper Roo was considered as highly unstable and even most other rapids chose to stay at a safe distance from it. Because of Roo's mental instability, it was not trusted with any tasks close enough to Cortex Castle that could bring harm or chaos to the facility.

Experimentation
Ripper Roo was one of the many animal test subjects of Dr. Neo Cortex. After being captured, he was zapped at least twice by Cortex's Evolvo-Ray which caused his fur to turn blue and for him to go insane. He was quickly straight-jacketed and abandoned, and came to reside in some ruins on Wumpa Island. Later Ripper Roo was hired again as a spy for the Cortex Corporation.

Defeat
Ripper Roo was defeated by the group of explorers after detaining Richard Birmingham. Ripper Roo was knocked back by the explosion of one of his own explosive crates, and fell into the water and subsequently off of the waterfall.

Later Years
After the defeat of Neo Cortex, Ripper Roo was found by Nitrus Brio who offered him a safe environment in exchange for his services. Ripper Roo agreed, and spent most of the next eight years hiding from the prying eye, as there were groups hunting down the abominable beast. Ripper Roo underwent intensive therapy and extensive education.

Personality
Ripper Roo was famous for his insane, psychopathic, and somewhat dangerous behavior. As a result of his insanity, he can be fearless, reckless, impulsive and unpredictable, often blowing himself or others up repeatedly with explosives. He has also proven to be highly tolerant and resilient to pain, as demonstrated s when he gets caught in a TNT or Nitro blast, either getting knocked out cold, becoming dizzy or just laughing it off.

Ripper Roo seems to have two sides to him - the other being Doctor Roo, seen primarily in Cortex Strikes Back. Prior to the game, he spent a year studying to become a psychologist, and penned a well-received book titled "Through the Eye of the Vortex: A Study of Rapid Evolution and its Consequences". He seems to spend his free time studying, and shows irritation at his studies being interrupted. However, an explosion is enough to return him to his usual self.

He is unique as the only speech he is capable of is insane laughter. Oddly enough Ripper Roo seems to have some attachment to water.