File:Sueurs froides 348.jpg
HP 1,000
Height 30-40 metres
Weight Many tons
Speed 5/10
Attacks Crushing 100AP
Hitting 100AP.
First Appearance Cold Sweat
Kolossus (known as Kolosse in French) is the largest monster in Code Lyoko. It has only appeared in the Ice Sector and the Ice Sector Replika. The Kolossus appears in Cold Sweat where it almost destroys the Skid. During Down To Earth, it destroys the Skid in a single hit.


The Kolossus has four Eyes of X.A.N.A., however it is the large Eye of X.A.N.A. on its face and the one on its sword that must be hit to kill it. Hitting any of the large Eyes individually does nothing to the Kolossus, as shown when Yumi threw a fan at the Eye of X.A.N.A. on its face. The fan was seemingly destroyed and the Kolossus seemed unhindered by the attack. However, when Ulrich stabbed the Eye and kept his weapon there, the Kolossus was paralysed until X.A.N.A. drew energy from all the Replikas to help the Kolossus. Hitting any of the small Eyes on the sword makes the Kolossus halt for a short period of time.

If the Kolossus touches a Tower, the part of the Tower that the Kolossus is touching glows red - possibly because of the seemingly intense heat on its hands. The Kolossus destroys the Skid in Down to Earth by knocking it off the Tower it was connected to, making it crash in to the Digital Sea. The Kolossus was defeated by Ulrich, who was devirtualised soon after by the monster's corpse, which crushed him.


  • The monster's name was given by Odd in Cold Sweat. He spells it with "K" so it's sounds like K.O., although he's not sure who will get K.O.-ed.
  • Ulrich is the only one so far to eliminate the Kolossus, by stabbing it in both of its Eyes of X.A.N.A. (one on its head, and one on its sword arm).
  • Odd once called the Kolossus "King Kong", in Down to Earth.
    • Odd also called the Kolossus "the Heap" in the same episode.
  • The creation of the Kolossus is a giant catalyst in the final episodes of the 4th Season.
    • Revealing the number of Replikas made Jeremie think twice about the idea of destroying Replikas one by one.
    • Destruction of the Skid further convinced Jeremie to build the X.A.N.A. Destruction Program.
  • The fights involved in are all of decent importance…
    • Freeing of William.
    • Destruction of the Skid.
    • Destruction of X.A.N.A.
  • The Kolossus has only appeared in Ice-related areas (the Ice Sector and its Replika).
  • Kolossus appear as final boss in Code Lyoko DS: Fall of X.A.N.A.


X.A.N.A.'s Monsters
Lyoko: Kankrelats | Hornet | Blok | Krab | Megatank | Creeper | Manta | Black Manta | Guardian | Tarantula | Scyphozoa | Kolossus
Earth:Spectre | Polymorphic Clone
Digital Sea: Kongre | Shark | Kalamar
Video game only: Mite | Exploding Roachsters | Scorpion | Insekt | Dark Monster | Volcanoid | Ubertank | Omegatank | Mountain Bug | Insekt Lord | Ice Spider | Desert Driller | Magma Worm

ca:Kolós es:Koloso fr:Kolosse gl:Monstros de XANA#Koloso it:Mostri di XANA#Kolosso pl:Kolos pt:Kolosso ru:Колосс