The Glitch is the computer virus that Ice King created in "A Glitch Is a Glitch." It was created so that it would consume everything in the Universal source code except for Ice King and Princess Bubblegum.
This virus serves as main antagonist of the said episode.
The Glitch seems to resemble Ice King. However, it is composed of many of the common glitches found on the Internet, making it almost unrecognizable.
|Adventure Time Villains|
Ice King | Marceline Abadeer | Lumpy Space Princess | Orgalorg | The Lich | Hunson Abadeer | Earl of Lemongrab | Flame Princess | Martin Mertens | Ricardio | Death | Marshall Lee | Ice Queen | Patience St Pim | Dr. Gross | Shoko | Magic Man | Vampire King | The Fool | The Empress | The Hierophant | The Moon | Ash | Flame King | Fire Count | Don Jon | Fire Kingdom | The Guardian | Gareth | Flying Lettuce Brothers | Tiffany Oiler | Guardians of Sunshine | Ooze Monsters | Fear Feaster | Kee-Oth | Maja the Sky Witch | Darren the Ancient Sleeper | Goliad | Blargetha | Demon Cat | Guardian Angel | Wendy, Booboo & Georgy | Squirrel | Stag | Scorcher | Jaybird | Smudge | Princess Cookie | Tree Witch | Xergiok | Me-Mow | Alpha Hug Wolf | Tree of Blight | Evil Monster | Donny | The Glitch | Grassy Wizard | Fight King | Furnace | Torcho | Gnome Ruler | Sir Slicer | King Worm | Blanket Dragon | Little Dude | Cute King | Why-Wolves | The Hooligans Who Love Candles