Invader Zim (1)

Zim, like all Irkens, was fused at birth with a mechanical device called a PAK. Zim's PAK provides him with life support, all the necessary nutrients for survival, and an array of different weapons and tools.

These tools include a set of four spider-like mechanical legs, an organ harvester, scanner pads, hand-held communicators, a memory drive, a charging cell, an atmospheric processor, high-tech infrared/night vision binoculars, holographic transmitters, and four rocket boosters, as well as a sort of biomechanical rebreather mask used in environments without air or with polluted air. It can also be 'rebooted' and revive Zim after a sudden shock to the system (like the wave of raw stupidity in "Plague of Babies").

Food services Zim's PAK after being re-encoded Zim's PAK, due to his actions after Operation Impending Doom I, re-encoded him as a Fast Food Drone; this was part of his banishment to the Irken snacking planet of Foodcourtia, and is confirmed by Frylord Sizz-Lorr during the episode "The Frycook Who Came From All That Space." Interestingly, the episode "Career Day" also shows that the job most suitable for Zim is fast food service.

As stated by Tallest Purple in the canceled episode "The Trial," an Irken PAK contains all of a single Irken's memories, personality, and high scores. An Irken assigned to a specific task has their PAK 'encoded' for that task by an Irken Control Brain, similar to formatting a hard drive.

In the same episode, Zim's true status was determined to be "Defective". Although a Defective is supposed to be an individual with a flawed PAK, and Zim's PAK was undoubtedly the most defective as Smeet Zim stated that it had "40 shmillion mistakes" and the unawareness of his destructive actions is most likely the result of him being a "defect", however, it can be seen in the episode that the process of determining an Irken's 'defectiveness' is highly subjective.

Water burns his skin, so he covers himself in paste, which somehow protects him from burning his skin with water. He also dislikes germs, because he's a germaphobe. He is allergic to most human food, like meat or beans. He's resistant to fire, and has high flexibility.

roof and door (which appears to have come from a men's bathroom). It's a tall, green house with a purple roof and door (which appears to have come from a men's bathroom). It has a satellite dish on one side of the roof, and the front yard is covered in lawn ornaments, including a flamingo, two puffer fish, and a flag that says "I Love Earth".

The house also has four large robotic lawn gnomes, which serve as the base's first line of defense – although they can easily destroy humans, it has been seen in many episodes that passersby can slip past them with ease (although they may remain harmless most of the time in order to avoid suspicion).

Zim's house is located on a dead-end street in a suburban neighborhood of the City, just a block or two away from the Membrane Home.

The house's walls appear capable of changing shape on command; in the episode "Plague of Babies," Zim was able to order the house to create a round window in the rear wall, which subsequently disappeared autonomously after he used it.

Zim's base has a main floor, an attic, and a series of underground floors that lead into the actual base. The main floor has two large rooms, roughly equal in size.

The first room is a hallway/living room/television room. It contains the front door, two closets (where the Roboparents are stored), a large pink couch, an armchair, a very large television set (equivalent to a wall-mounted plasma TV), a picture of a green monkey that doubles as a two-way video communication screen with the Tallest, and an entryway to the kitchen. There is a small picture of a squid by the doorway.

The front door has a very interesting feature: Instead of a peephole, Zim presses a handprint-scanning device that appears on the door, causing the door to become transparent from the inside and reveal to Zim anyone who knocks on the door or rings the doorbell, as revealed in "Tak: The Hideous New Girl".

The second room is the kitchen: It contains the typical furnishings found in any ordinary kitchen: a table with two or more seats, kitchen supplies, cabinets, a refrigerator, and a toilet by the far wall that functions as an elevator to the lower levels of the base.

Above the toilet is a poster that says "I eat food" (taken directly from Johnny the Homicidal Maniac, as one of Nny's constantly-changing shirts) and on another wall is a poster that says "Earth Food Rocks!". On the other wall, facing the living room and next to the table Zim and GIR eat on, are posters that say (from right to left) "Biohazard (with logo)" and "Meat is Best!", as revealed in "Battle of the Planets". The first floor's ceiling seems to be made of an arrangement of claw-like pipes. There is also a hall in front of the living room with a statue of a pig, some more bizarre pictures, and a door which presumably leads to the bathroom.

Zim uses the pronouns "I," "me," and "my" the vast majority of the time he refers to himself. He uses his name in place of a pronoun to refer to himself in 18 out of 27 full episodes, or 21 out of 46 segments (but see #5 below). He says his name in a couple more instances than that, but not in place of a pronoun. Technically, "I am Zim!" is not an instance where he is replacing an "I," "me," or "my" pronoun with his name. Zim replaces "me" with his name as the object of a sentence rather than replacing "I" as the subject. There are only a few exceptions to this norm. He tends to replace one first-person pronoun in a sentence with his name and leave the rest intact, rather than substituting "Zim" for every first-person pronoun in the line. For example, in "The Halloween Spectacular of Spooky Doom," he says, "I break free and now I have to go back to rescue that little rat that left Zim to rot?" Even this kind of sentence reinforces the fact that Zim uses "I," "me," and "my" regularly, and Zim-as-a-pronoun as a more infrequent thing to add emphasis or drama.

While most Irkens are expected to be ruthlessly loyal to the Empire, Zim is considered overzealous even by their standards: Brash, arrogant, and overconfident, Zim's tendency to cause wanton destruction makes him a danger to himself and his own people, yet he still considers himself a mighty Irken warrior. In addition, he is acutely narcissistic and megalomaniacal, congratulating himself on even the smallest of successes; these, however, are few and far between.

Despite his self-proclaimed greatness, Zim rarely succeeds in his attempts and is treated as a complete laughingstock, a scapegoat, or a figure of contempt by his own species—a fact he is either oblivious to or simply chooses not to notice. This is hinted at by the fact that his self-absorbed nature prevents Zim from seeing his failures, past and present. He claims to be proud of all the past disasters he has caused and rarely acknowledges his defeats in his current mission on Earth (often blaming them on other characters, other factors, or completely changing the subject). When Tak tells him in "Tak: The Hideous New Girl" that his "mission" was really an attempt to get rid of him, he simply rejects her statement as a lie. It is not entirely clear whether Zim is aware of his failings in the eyes of his leaders and is desperately trying to compensate for them, or whether he is truly oblivious to the opinions of others, having deluded himself into thinking he is "amazing" and can do no wrong.

Despite this, Zim is innocently loyal and obedient to the Tallest, the Irken Empire, his planet and his people, and is willing to go to ridiculous lengths to please his leaders, to the point that he is zealously willing to endure pain or hardship in order to gain their respect. In the episode "Planet Jackers", Zim even undergoes a rather severe beating in the name of protecting his mission and Irken interests.

Zim, like most of the Irken race, seems to be based on the typical "little green men from outer space" stereotype. Many Irkens are about the size of a preteen schoolchild, but Zim is exceptionally short, earning him ridicule from his fellow Irkens, who are respected only if they are tall in height, as confirmed by Dib. Zim's disguise consists of two purple contacts and a black bouffant wig. In "The Nightmare Begins", Zim was shown to be even shorter than the notoriously diminutive Skoodge. In addition to his short stature and green skin, he also has round teeth (resembling gums more than actual teeth), and a long, worm-like tongue.

Zim also has ruby-colored eyes; a very common trait in Irkens. It was also mentioned in "Walk of Doom" that Zim's eyes contain ocular implants.

As he considers himself to still be an Invader, he continues to wear the standard uniform: a red tunic-like garment with three black stripes and a triangular pink collar and sleeves, as well as black boots, leggings, and gloves. His PAK is light gray with pink spots.

He also possesses a pair of antennae, however, their exact function is unclear. His antennae visibly pick up vibrations in "Battle of the Planets". In Enter the Florpus, Zim's antennae convey emotion by either standing alert or drooping while he "schmoops".

His height is between 1.2 meters tall. He is quite short.