Prior to the Great Cataclysm, Kokkan lived and worked in Ko-Metru. He was captured by Vahki under the command of Makuta Teridax disguised as Turaga Dume. He was then placed into a Matoran Sphere and went into stasis, but was later rescued by the Toa Metru and reawakened on the shores of Naho Bay on the Isle of Mata Nui when the Toa Metru sacrificed their Toa Power and became Turaga Metru for the Matoran's sake.
On Mata Nui, Kokkan was smaller and weaker as an effect of the Matoran Spheres and he also lost his previous memories. Regardless, shortly after their arrival on Mata Nui, he participated in the construction of Ko-Koro from recycled pieces of the Airships which had been used by the Toa to transport the Matoran to Mata Nui during the Great Rescue.
In Ko-Koro, Kokkan became a Trader. Following the defeat of the Bohrok-Kal, he was rebuilt into a more able form, similar to the one he had had on Metru Nui.
Kokkan was evacuated from Ko-Koro with the other Ko-Matoran following the Rahkshi's attack on the village.
Return to Metru NuiEdit
Kokkan later helped in the construction of Boats to facilitate his, and the other Matoran's return to Metru Nui. Once they had reached, the Matoran, including Kokkan, worked on the city's reconstruction, until the usage of the Staff of Artakha restored Metru Nui to its' former glory.
After Teridax's defeat at the hands of Mata Nui, Kokkan and the other Matoran evacuated to the reformed planet of Spherus Magna, where he now resides.