The Ultimate Protobot kidnaps Gary and the Elite Puffles. The player must stop the Ultimate Protobot and rescue Gary and the Elite Puffles. When you defeat the Robot, you will be promoted and you have finished the major missions. You must use the Elite Puffles during the battle.
In System Defender, he was rebuilt by Herbert P. Bear, Esquire, and is taking revenge on the EPF. Protobot and Herbert soon began to hate each other and their alliance was broken.
On the new message feature of the spy phone the Ultimate Protobot 10000 sent a message declaring he needed parts from the EPF database and was going to destroy the EPF. This hints at another level in the System Defender game. Later on how ever it is revealed in System Defender that Herbert P. Bear rebuilt the Protobot.
During the Marvel Super Hero Takeover 2013, the energy crystals powered up Protobot, unleashing a full-scale revenge attack. Using The Mandarin as the leader of his armies, Protobot ordered the Super Villains to create their own robots, and attack Club Penguin. When he is finished attacking Club Penguin he plans to turn all the penguins into robots, and become the leader of a new technologically advanced metropolis called Robotopia, to replace Club Penguin Island. He was defeated and disappeared on May 9.
The EPF got a message in a code from Herbert on a Field-Op which was soon figured out it was the Test Robots and Protobot's location they were destroyed, again, next Field-Op on 5-9-2011.
Herbert decided to leave Protobot and ally with the EPF for a few days because he wanted to remove Protobot from his major plan. Herbert had said "That’s right you mechanical menace! I should never have rebuilt you! I wanted to DEFEAT the Elite Fools, not destroy them!", after Protobot made a plan to destroy the EPF. Herbert gave away Protobot's location, and a couple of weeks later, the EPF defeated him with a water cannon. He has since retreated. The last heard from him was "Reclassifying - the polar bear is now our enemy. System damage unrepairable. Retreating until a new engineer can be located. BZZZK.
This is the only invention to end in "10,000." As most inventions (invented by Gary the Gadget Guy) end in either: 3000, or 1000.
It can learn from mistakes and enemy tactics quickly and efficiently to calculate the deadliest attack.
It also makes an appearance in Card-Jitsu as a power card, only it just rolls away and has red, yellow and purple bots roll over you instead.
It makes a slight appearance in the Penguin Times Issue #345. Though it shows he is much smaller as his head was not big enough to fit a penguin It's likely that it gets fixed and returns during the Marvel Superhero Takeover 2012, since it looks like the robot-like figure in some of the party's advertisements.
It is unknown how he is still alive because all his parts still in their original spots on Club Penguin.
He returned during the Marvel Super Hero Takeover 2013 as Jet Pack Guy mentioned him in the Club Penguin Times just weeks before the party, and said that he probably got deleted, but he was wrong. Protobot was revealed to have been brought back to life by the energy crystals, and ordered the robot armies to attack Club Penguin.
In Issue #392 of the Club Penguin Times, there is a binary message from him that says 01110010 01101111 01100010 01101111 01110100 01110011 00100000 01100001 01110010 01100101 00100000 01110011 01110101 01110000 01100101 01110010 01101001 01101111 01110010 00100000 01100010 01100101 01101001 01101110 01100111 01110011. It translates to, robots are superior beings.
In the next issue, he says 01011001 01101111 01110101 00100000 01110111 01101001 01101100 01101100 00100000 01100001 01110011 01110011 01101001 01101101 01101001 01101100 01100001 01110100 01100101 01100100, which translates to, You will be assimilated.