Biobliterator

The Biobliterator was Dr. Nefarious's superweapon that ravaged Metropolis on Planet Kerwan and many other planets in the Solana Galaxy, turning the inhabitants into robots. However, the Biobliterator required a massive amount of energy, and had to refuel on planet Koros.

Ratchet and Clank first discovered the existence of the Biobliterator at Dr. Nefarious' factory on Planet Daxx by hacking into the databases. The Biobliterator's purpose remained a mystery, but it first came to light when Skid McMarx was turned into a robot by Dr. Nefarious' ally, pop star Courtney Gears. Ratchet managed to defeat her, but Skid was to remain a robot for a while. When Metropolis was attacked and its people turned into robots, the galaxy finally caught on with Nefarious' intentions. On Zeldrin, the duo found a datadisk Captain Qwark tried to obtain when Nefarious' cruiser was destroyed in Zeldrin orbit. Using the info in the datadisk, Big Al discovered the full extent of Nefarious' plan and learned that Veldin would be the next target. This brought the duo to planet Koros.

It was on Koros that Ratchet and Clank found the first Biobliterator and destroyed it with a ion cannon, unaware that Dr. Nefarious had already created a second, improved version of the Biobliterator. The second was larger and transformed into a giant robot armed with thousands of missiles that Ratchet and Captain Qwark destroyed at the Launch Site after beating Dr. Nefarious. It was the final boss of the third game. Once the head exploded, Nefarious and Lawrence were stuck on an asteroid until it crashed landed on Zanifar many years later.

Later while Ratchet was fighting Nefarious in Nefarious Space Station in the Polaris Galaxy, Nefarious mentioned the Biobliterator while fighting.

Trivia

 * The Biobliterator bears a resemblance to the Death Star from Star Wars, however it turns people into robots instead of destroying planets. Furthermore, just like the Death Star after the first Biobliterator was destroyed a second more powerful one was revealed just as the Death Star had it's own more powerful counterpart.
 * The Biobliterator's transformation from a "planet" to a giant mech gave a resemblance to 'Unicron' from Transformers: The movie cartoon.

Appearances

 * Ratchet & Clank: Up Your Arsenal
 * Ratchet & Clank Future: A Crack in Time (mentioned only)