Robotboy is a robot built by Professor Moshimo. He was designed to resemble a real boy. Robotboy has three activation modes: deactivation, where he resembles a doll; normal, where he is roughly Tommy Turnbull's height; and super activated, where he is twice Tommy's height, and has a plethora of machine guns and rockets. During the opening, it's stated that Robotboy was given to Tommy for Robotboy to learn how to be more like a human boy, but it is not stated how long he had been activated or why Tommy was his chosen guardian (we can presume that Moshimo's reasoning is behind Tommy being his number 1 fan)
Robotboy is roughly 45 cm in normal mode, 30 cm in deactivated/toy mode, and 182.5 cm in super activation.
"Robotboy is a robot with three modes: Deactivated, Activated and Superactivated. While deactivated, he becomes small enough to fit into a backpack. As well as being incredibly almost indestructible, Robotboy has an emotional chip that makes him think and feel like a real boy."
Roboyboy is naive, and is very easily led (most often by Gus, and into certain negative situations). However, when things come down to the wire, he's often the first to react and has a fair understanding of his surroundings and circumstances.
Robotboy is over-protective of Tommy and his friends (and Robotgirl during their brief encounter) On more than one occasion, he's been openly willing to do anything to keep each of them safe. If Tommy orders him to stop though, Robotboy will stop almost instantly. Robotboy's over-protectiveness is more blatant in the beginning episodes of the first season, then again near the end of the season. This cycles throughout the first three seasons that were aired.
He is shown not to like dishonesty, and has a fair bit of respect for those around him (except for Gus). He appears to like having fun with Tommy and on occasion Lola.
Robotboy was created by Professor Moshimo as a force to protect the world from threats after Protoboy failed. But because he was in danger he was then passed to Tommy to learn more about humanity, which is the base of the show.
Robotboy's powers can be sectioned by his modes of activation.
Active: Flight, Extreme Strength, Extreme Durability, Speed, Light Vision, Freeze Ray, Freeze Vision, Shrinking, Wind Breath, Super Activation, Can survive and move without his head, Super sonic sound, Can be proven to be water-proof on sea.
Super activation: Flight, a variety of lasers, Strength, Record Player, Speed.
Main Weaknesses: Low or dead Batteries, Others in danger, Oil, Certain liquids, (e.g. Ice Cream or grease), Food.
Tommy is Robotboy's keeper and best friend. Having the biggest interaction with him they mostly spend together in many different adventures whenever they have free time or whenever danger is in needs. They often have each others' backs, but Tommy is often the one to be saved. However even best friends have they're days as do with Tommy and Robotboy; because of him being so naive, Tommy (sometimes under the influence of Gus) will sometimes take advantage of him in order to get something he wants or to skip his regular childhood life of school or a few other things and since being a kid himself will incoherently hurt Robotboy's feelings. Though best friends and promise to teach how to be a real boy, the act on Robotboy's secrecy often puts Robotboy indifference with Tommy whenever he goes off to do something fun or cool unbeknownst to Tommy neglecting his best friend. However they always managed to put their differences aside and stay the best of friends.
Good friends. While they don't have a large amount of interaction, Robotboy has shown some protective tendancies around Lola, and they get along decently.
Friends (Often grudgingly). Gus has been known to manipulate and use Robotboy for his own gain. Due to this, Robotboy is often at odds with Gus by the end of an episode or sometimes even in the middle of one.
Good friends. Robotgirl and Robotboy often protect each other and can be friendly antagonistic of each other. (But when we see, they show their feelings to each other, they are just friendly). As she was built after Robotboy, Robotgirl often has to learn things from Robotboy the hard way.
Enemy. Kamikazi has tried on many occasions to reprogram and clone Robotboy or destroy Tommy, to no avail.
Enemy. As he works with Kamikazi but is not always in the area of attack, Robotboy and Constantine do not interact directly often but has fought with each other in some episodes. In some way Constantine is rather a potential opponent to Robotboy, getting the best of him short-handily where other villains could not.
Enemies. Both are bent on destroying the other (as per robot fighting rules), but are perfectly equal. Because equality in strength it said by Moshimo that they could fight for eternity until one of them destroys one another.
Enemies. Although they were friends at first, Protoboy's attempts to cause havoc and to kill Tommy stopped these attempts in their tracks. Robotboy allegedly destroys Protoboy, but it is revealed in a later episode that the attempt proved futile. He returns again, this time outright eliminating Robotboy, but fails and is, again, apparently killed. As per usual, he returns again and tries to eliminate Robotboy and Robotgirl, but was defeated once again and killed for good. Despite being enemies to each other Robotboy has feelings for him and tries to convince him to be good instead of being evil since they are brothers after all.
Robotboy has been compared to other shows with similar characters numerous times. First Astro Boy, of which it has been referred to as a clear rip-off by some people. The similarity may be related to the fact that the 2003 version of Astro Boy had also run on Cartoon Network about two years prior to Robotboy. Secondly, it's also been labeled rip-offs of "My Life as a Teenage Robot", a show on Nickelodeon, and "Whatever Happened to Robot Jones?", another show on Cartoon Network. On My Life as a Teenage Robot, Jenny Wakeman is a robot who acts like a normal teenager and is a superhero, which Robotboy is, while Robot Jones is learning about the very basics of human behavior, which Robotboy is doing as well. Lastly, Robotboy shares several very close similarities with the popular video game character Mega Man, the current mascot of the company Capcom, including an identical color and body appearance schemes save for the face and the use of a "Prototype brother" robot as a plot-line. Also, in the episode, "Sweet Revenge", the pilot of the helicopter is seen bearing the symbol of the rebel forces from the Star Wars series. Robotboy may actually be a coincidence or an homage to those franchises. Robotboy as a character is really exempt from controversy. Short of Kamikazi, Robotboy is one of the characters with the highest amount of controversy. Popular reasons include:
- His voice impediment.
- His coloring in comparison to other characters
Following the production of My Life as a Teenage Robot, another robot themed show, a number of companies tried to and gave up on creating their own robot themed shows.
- Along with his best friend Tommy, Robotboy has appeared on every episode of the series.
- Robotboy refers to himself as "third person" in most episodes, however it could be due to his lack of grammar. However, there are some moments where he referred himself as "first person", albeit with his lack of grammar.
- Robotboy was told what jealousy means twice (The first time was in Dog-Ra, and the second time was in Valentine's Day).
- Robotboy is never seen speaking in his Superactivated form, except in a few French episodes.
- There are exactly 7 episodes where Robotboy does not say or speak a single word, the episodes that include are: "War and Pieces", "Constantine Rising", "Kurt's Father", "The Manchurian Robot", "Tummy Trouble" "Mancation" and "Momma's Boy".
- Robotboy is unable to cry, until the events of "Crying Time" and while it is the only episode where he cries he almost cried with joy in the episode "Hair-A-Parent".
- Throughout the whole show, Robotboy has Superactivated approximately 89 times
- In Tummy Trouble and The Legend of Brainy Yak, he along with Tommy Turnbull is not a main character.
- The first words we hear from Robotboy are: "Evil, Robotboy destroy!" Referring that he wanted to attack the Dog-Ra, being disguised as a little puppy, from the premiere episode "Dog-Ra".
- The very last words we get to hear from him in the show would be: "No, get back!" When he tried to stop Robotgirl from being turned into titanium in the factory in "The Return of Robotgirl".
- Two of Robotboy's favorite TV shows are The Human Fist Show and Mortal Kombot.
- There was a popular belief that Robotboy was voiced by Tara Charendoff Strong. However, this is a mere rumor and thus not true.