Cars and Cars: Mater-National
The Motion Control File (MCF)
The MCF is designed to organize and specify which raw motion (animation file) is played for a given action. Often these are broken into several files. The first uses the character ID (ex: Lightning McQueen = McQ.mcf). Others use the following format: [character ID]_[event]_[type].mcf, with [type] being optional (AI for an AI controlled car, PL for a playable). (ex: Lightning McQueen, Tractor Tipping, Playable = McQ_TT_PL.mcf) Presumably these are split out into multiple files to conserve on system resources loaded at runtime for a given event.
Motion files (MOT, GOT)
These are the raw animations and are controlled by the MCF. Aside from header information, MOT and GOT files appear to be identical.
This is a bit more fuzzy, but it appears that both the MCF and raw animations are compiled into one file. The header reads BINMCF in a hex editor, which my imply that these are BINary MCF files.