X2 who are you? is the 33rd episode of Super Digimon Xros Wars.
The episode opens with Solar Flare getting their 21st Code Crown then Machinedramon appears out of nowhere and demands a battle, to which Ryo accepts, Ryo Reloads Cyberdramon, many Gaossmon, and a new Digimon. Then Blue Xros Heart arrives, and see the battle and chose to back up Ryo and X5 enters the fight. Ryo thanks them for the help and Digi-Xroses MetalGreymon, Cyberdramon, and the Gaossmon. X5 then strikes and with some help from Ryo they defeat Machindramon. Then 21 Code Crowns appear and Ryo gives them to Blue Xros Heart and leaves. X5 then sees Shoutmon X2 who he thinks is the king. Blue Xros Heart then makes the total saying that there are 87 Code Crowns left. The team then fallows Solar Flare.
(Numbers indicate order of appearance. Bolded characters are fought by the protagonists, and italicized characters appear only as a voice or silhouette.)