The Boxor was a vehicle used against the Bohrok swarms. It was invented by Nuparu.
The Boxor was designed by the Onu-Matoran inventor Nuparu. The Matoran on Mata Nui used it in their defense against the Bohrok and Bohrok Va. The Boxors were disassembled for transport to Metru Nui.[2, 3]
After the Matoran rebuilt themselves, they probably rebuilt the boxors so they could accommodate a larger driver.
The extra parts not from the Gahlok that were used to build the boxor were probably crafted by Nuparu out of solid protodermis.
It was probably powered by the same thing that powered the Bohrok.