This is a tool-assisted speedrun. For more information, see http://tasvideos.org/1887M.html. TAS originally published on 2011-10-02.
Sigma returns again and Earth is in great danger. Zero is off having a party all night, so Mega Man X steps in to do the job. Even if not as awesome as Zero, he still manages to do the job in less than 20 minutes while also getting the Ultimate Armor.