The later name for Mario Kart 64’s Extra Mode, in which every track is flipped, is Mirror Mode.
Mario Kart 64 originally presents this as “Extra” or Extra Mode, an additional high-difficulty class beyond the standard 50cc, 100cc, and 150cc engine classes. In it, the courses are reversed laterally: left turns become right turns and familiar landmarks appear on the opposite side of the track.
The mode is unlocked by earning maximum points on every cup in the 150cc class. Mario Kart 64 contains four cups with four courses each, so mastering the game’s sixteen tracks is required before the flipped layouts become available.
Later Mario Kart games standardised the name “Mirror Mode,” making the term more familiar to players. Battle Mode and Versus Mode are multiplayer formats, while Time Trials focus on solo lap times; none of those names describes reversed racing courses. The distinction is therefore historical naming rather than a different type of challenge.