Edenia, F-3. Defeat dark Raiden walking around. You only inflict 10% damage, but the fight isn't really all that hard. haven't seen this anyway else, so I hope its helpful.
Also, is anyone else having trouble with this site freezing up for about 10 seconds every time you load a new page?
And finally, I think I know where Dairou's alt outfit is. Has that one been discovered yet? I'm gonna go double check. I think it was chaosrealm, same place where you can fight Bo RAi Cho and Sonya. I'll check it to be sure, but go there yourself if you haven't gotten it yet. I really think that's where I found it.
Again, if this has already been up i'm sorry, I know that gets annoying when people post the same things over again. I hope this was helpful.