Mute City is unlocked from the start. It is also Captain Falcon's Home Stage.
The stage begins on the track at the starting point of the race. A sign will appear and say "GO!!!". Then a platform will come out from under your character. It will hover over the track. If you touch the track while the platform is hovering, you will take damage. The platform will stop for a moment, then you can fight on the track again. Watch out for cars though; you will take damage if a car hits you. The process will keep repeating itself, where the platform will rise up and take you to another part of the track to battle on. Towards the end of the track, the platform will hover over open space. If you fall to far down, then you will die. The platform will then arrive at the finish line again and the stage will start over.
The racecars are destroyable: they can be removed from gameplay by hitting them with explosives, immovable Pokemon (such as Charizard), or extremely powerful attacks (such as the Hammer or the Falcon Punch).