Timing begins when selecting "Game Start" and ends when you lose control of X or Zero after the wall climb. Turbo is not allowed.
The current accepted version of the game is 4.0.
100% rules:Must collect the 4 main armor parts, 8 heart tanks, 4 subtanks, 4 ride armor chips, and the black/gold armor. Collecting Zero's Saber for X is optional. Switching between X and Zero is allowed in this category.