Sheldon J. Plankton is the buisness rival of Mr. Eugene Krabs and owner of a low-budget restaurant called The Chum Bucket. His goal is to steal the Krabby Patty Recipe and later enslave the citizens of Bikini Bottom.
Cartoon Villains War
Vs Dr.Heinz Doofersmith
After his victory against Cyril Sneer, Mr. Burns continued to expand his business empire. This caught the attention of Sneer's former business partner, Dr. Heinz Doofenshmirtz, CEO of Doofenshmirtz Evil Incorporated, who decided to eliminate Burns himself. Hearing of this and fearing for his life, Burns decided to contact an old business associate, Sheldon J. Plankton, and tasked him with getting rid of the troublesome doctor. Plankton agreed, and attacked Doofenshmirtz's headquarters in a robotic battle suit. Doofenshmirtz immediately used his building's security measures to briefly stun Plankton, allowing him to retreat to the roof, followed by Plankton. Doofenshmirtz then prepared a large ray gun, threatening to obliterate Plankton. However, Plankton decided to use a new tactic, launching out a small scout robot from his suit. This briefly distracted Doofenshmirtz, giving Plankton the opportunity to knock him off the roof, leaving the doctor to fall to his death.
Glomgold, having deduced that Mr. Burns and Plankton were behind the attempt on his life, sought to retaliate against them. To this end, he hired Megavolt (the only other member of the Fearsome Five that managed to escape after their defeat) to eliminate Plankton. Easily tracking the businessman down down, Megavolt broke into one of his factories, where Plankton had stayed late to finish some work. Shocked by the intrusion, Plankton activated his security system, mobilizing several robots to take Megavolt down. Unfortunately for him, Megavolt managed to easily overpower and destroy each of the robots However, Plankton still had one last ace in the hole, as he activated his newest and most powerful robot yet, Darrell. Making a dramatic entrance, Darrell quickly demonstrated how formidable he was by blasting Megavolt all the way across the room, winding the rat. However, Megavolt quickly recovered, and knocked Darrell back with a surge of electricity. Using a laser sword, Megavolt proceeded to slice Darrell's arm off, leaving the robot severely damaged. As Megavolt celebrated his supposed victory, however, the ever resilient Darrell got back up and punched the sword out of his hand. As Megavolt got tangled up in the wires connected to his sword, Plankton took the opportunity to plug it into a nearby outlet, electrocuting the rat. Darrell then proceeded to finish Megavolt off with several point-blank blasts of energy, knocking him unconscious and leaving him to be picked up by the police.
Hoping to make up for the damage caused by Megavolt's attack, Mr. Burns hires a new assistant, Rancid Rabbit. However, the crime lord Fat Cat, annoyed by Burns and Plankton doing business with his competitors, uses experimental technology stolen from Xanatos Enterprises to create a glitch named Giffany and sends her to invade their company, where she begins taking over all of Plankton's robots. Unable to stop her, Plankton turns to Rancid, who extracts his own 'glitch', Rob, from a place called the Void and sends him to deal with Giffany.
Glomgold informs Fat Cat that it is time to strike against their common enemies, Mr. Burns and Plankton. With Fat Cat's old friends, the Beagle Boys, piloting his newest prototypes, Glomgold attacks Plankton in his home. Although Plankton uses all the means at his disposal to mount a formidable defense, Glomgold's weapons are a little...bigger than he anticipated.
Plankton, having survived his battle with Glomgold, returns to Mr. Burns, informing him of the attempt on his life. Burns decides it is time to take more direct measures against their rivals.
Hiring New Allies
With the war coming to an end, Burns and Plankton gather their allies to take down their rivals, with Plankton introducing a few of his relatives and a newly rebuilt Darrell as extra backup. Unfortunately, Glomgold has had a similar idea, and decides to hire the services of Don Karnage.
Vs Glomgold forces
With the Beagle Boys dealt with, the rest of Burn’s forces charge in, catching Glomgold and his allies off guard. Glomgold, Fat Cat, Karnage, and his pirates face off against Burns, Rob, Fuzzy Lumpkins, Rancid, Darrell, and the Gangreen Gang, with Plankton aiding them remotely and waiting with backup...
With his forces defeated, Glomgold mounts one of his robots with the intent to wipe out his rival for good. Plankton and the others are overwhelmed by the arsenal of Glomgold’s robot.
Non Disney Heroes Vs Villains War
TV Villains War
In the "TV Villains War", Plankton was the first to fight with his opponet, Mandark. After a harsh rejection, Plankton over-powered the control of DeeDee, Mandark's love interest, giving him the chance to destory his laboratory. Later in Round 2 Epilouge Plankton is so far Closing in The War and has His Army Of Himself but they look like HillBillys, After the Discussings Plankton,Karen,And Their Army is about to Defeat the Villains.
Karen Told Plankton that Someone is coming to destroy him she Picks 3 Ladies but Plankton picks the Wrong one and His minions wanted to come with him but Plankton thinks he can take his own, He goes to Camp wakanawa to have 'Chat with Heather" Heather insulted Him but Plankton Transform in to A Cockcroch to scare everybody only He was Killed by Duncan.
Or Was It!? It seemed the Evil Scientist Dr. Robotnik found the Dead cockroach and Tranform back to Plankton but He was Killed buy Heather's Friend Duncan, Dr. Robotnik revive him and Form an alliance with him and Plankton says Yes and He want to get his Revenge on Heather leaving Dead more than Mandark.
War of The Villains
In "War of The Villains", Plankton feels like he will never accomplish ANYTHING in his life. His computer wife, Karen, suggested that he seeks the help of Bob The Killer Goldfish, ruler of La Planeta De Agua (ARRIBA!).
Plankton then flew to the planet, but was quickly swatted by Bob's Cat Drone, #4, leaving him knocked out and unconsious. Once awaking, Plankton offered an alliance with Bob, who only laughed at his proposition. An angered Plankton then put a Chum Bucket Bucket Helmet on the tretorious Goldfish, turning him into one of Plankton's Servants.