The character was first voiced by John Kassir in the short film " Adventure Time", which introduced the character. In the short, the protagonists Pen the Human ( Zach Shada) and Jake the Dog ( John DiMaggio) fight Ice King to rescue Princess Bubblegum, whom he has kidnapped. He is voiced by Tom Kenny in the television series. Kenny said that he approached the character as "a very real psychopath" who did not fully understand why his actions were wrong. Ice King is similar to the Teen Titans character Mumbo. They both have blue skin and white hair, they are both voiced by Tom Kenny, and they are both magic users with similar origins. Since then, the Martians have made a number of memorable appearances, sometimes the star of their story, and sometimes part of the supporting cast. Ice King is one of the bosses in Adventure Time: Explore the Dungeon Because I DON'T KNOW! Once you defeat him, you can play as him.

In 1967, television viewers had a new foe to fear, after the Daleks and Cybermen, when all the way from Mars came a frightening new breed of monster, the Ice Warriors. Later on, the friends of Finn and Jake sing the " Time Adventure" song, allowing Simon and Finn escape from inside GOLB, although Betty decides to stay behind as a sacrifice and use the Ice crown (which was restored to its essential form, granting its wearer their deepest, truest wish) to wish GOLB out of existence. When this doesn't work, she wishes instead that Simon is protected at all costs. As a result, Betty is fused with GOLB and the two become one singular entity. Devastated at Betty's decision, Simon cries out for her as the new GOLB leaves the planet through another portal, and is comforted by Marceline. Before the portal closes, the Ice Crown falls to the ground. Gunter decides to wear it, fuses with it and is transformed into Ice Thing after wishing to be Ice King. In a retrospective review of the series, Eric Thurm of Vulture called the Ice King " Adventure Time’s Best Character" and opined that the character's appeal came from his complex flaws. He felt that Ice King embodied both intense struggles such as Alzheimer's and more mundane issues like social awkwardness, making him relatable to a wide audience. The Second Doctor finds it’s being run by the Ice Warriors, who are preparing the Earth for invasion by sending Martian seeds pods to the planet’s surface – the seeds emit a fungus that is lethal to humans…The Ice King's crown bestowed upon him numerous powers in exchange for his sanity, most of which involved ice and snow. He can cast ice lightning to freeze or strike targets and can summon blizzards at will to cover the land in snow. He is also capable of creating various weapons or structures out of ice. He can also animate beings of ice and snow, like the Ice-o-pede and snowman soldiers. Due to the insanity brought by wearing the crown, Ice King seems to have limited memory. This was first seen in "I Remember You," where he does not seem to remember his past as Simon Petrikov, even though he saw the history (after he found the crown) in " Holly Jolly Secrets Part II." Later on, he does not remember who Neptr is, even though he was the one that wanted Neptr to accept as his father in Neptr's debut, " What is Life?" and even confuses him with BMO, as seen in the events of " Mystery Dungeon." Simon may have been a fan of the classic TV show Cheers, as he reenacted the iconic "Norm!" greeting in " Simon & Marcy" and even sang an abridged version of the theme song. Prolonged physical body is also given by the crown as the Ice King, even though elderly, has a rather strong physique being able to carry people by the hand. This is especially odd given the frailty of his old bones and skin, although this could be attributed to Ice King often mentioning working out.

The Romans by Donald Cotton, read by Tim Treloar, Jamie Glover, Dan Starkey, Jon Culshaw, Maureen O’Brien and Louise Jameson Despite Ice King's more antagonistic role, he plays the part of a protagonist in " Mortal Recoil," as he helps Finn and Jake defeat Princess Bubblegum by freezing her Lich-possessed body. In the mini-episode, " The Wand," he actually helps Finn and Jake regardless of the fact that Finn said to "sacrifice" himself, but unbeknownst of the fact that it also changed his face. Today, one Doctor Who’s most iconic and fearsome aliens celebrate fifty years since their first appearance on the show. Simon Petrikov, formerly known as the Ice King, is a major character in Adventure Time and a protagonist of its spin-off series Adventure Time: Fionna & Cake.Neil Strauss of Rolling Stone noted that the character bore some similarities to Ward, including his "Trotsky glasses", his large beard and his strong desire for social interaction. Strauss said that "If the Ice King is Ward's dark side, then Finn, the show’s 16-year-old protagonist, is his light side." When Professor Irene Hyde’s Monday morning lecture at St Luke’s University is rudely interrupted by a man named the Doctor, it’s the beginning of an adventure she could never have dreamt possible. The Ice King was shown to be able to take people to his " Imagination Zone" where he was able to create illusions. He uses this power to try to convince Neptr to join him with the promise of princesses. [3]

Sometime before the Mushroom War, Ice King was a normal, olive-skinned, dark-haired human named Simon Petrikov who was studying to be an antiquarian (a specialist in the knowledge of ancient artifacts). He was also a Professor of Archeology, and gained a PhD in an unknown subject. At one point, he went on an expedition to try the Armor of Zeldron, the Wand of Dispersement or the creepy porcelain lamb. He did not succeed, but still believed that these artifacts existed, and shortly after had a presentation about his expedition, where he expressed desire to search for The Enchiridion. He was ridiculed by others for his belief in magical objects. He also has a power called Wizard Eyes, which makes him see strange things and puts him at risk, and he is not fully conscious while he uses this power. In "Beyond this Earthly Realm," it is revealed that his Wizard Eyes allowed him to see into the Spirit World, explaining that the freaky creatures surrounding him were spirits like Finn when he is transported to the Spirit World. In " The Empress Eyes," he seemed to possess immunity to the Empress's hypnotic abilities.Ricardio seems to know about Ice King's previous life, being his former heart, and this seems to be true because in the episode "Lady & Peebles" when Ice King asks for a hug, Ricardio steps on him and says "Silence, Simon!" In the series finale " Come Along With Me" Betty, King Man and Maja summoned GOLB to Ooo. Betty had linked herself with Maja with the goal of harnessing the power of GOLB. King Man told Ice King that he is the only one who can stop her. Ice King compared King Man's instruction to reason with her to "fan-fiction." and began singing "Oh, Fionna" to her, which caused her to awaken and madly berate him for opposing her when she was almost "successful" in using GOLB's power to cure him. Her powerful emotions connected to Maja causes the latter to explode, blasting Ice King and Betty into GOLB's mouth with Finn jumping in after them. This might be a reference to the fact that Bubblegum's preliminary name was Bettie, although it's spelled differently. As the Ice King, Simon Petrikov's skin turned light blue, his nose became pointy and long, his eyes and hair turned white, he grew a full beard, and his body temperature dwindled to an unnatural low of 30 °C, or 86 °F (normal human body temperature is 36 °C or 98.6 °F). His ice-based magic abilities come from a magical crown he wears, which directly causes his insanity. The Third Doctor and Joe are embroiled in political intrigue and the Time Lord is suspicious of the Ice Warrior delegates…