Anyone with Pokemon Black 2 attending Kumoricon? Unova Link needed

[Sui Kune]

Hello! :3

Since unfortunately I don't have any IRL friends that play Pokemon, I'm in need of someone who has completed Pokemon Black 2 far enough to have obtained the Iron Key to unlock Registeel in the Underground Ruins. I've obtained the Iceberg Key so I'll be able to transfer that to you if you don't already have it, along with the option to unlock White Treehollow.

This is the last thing I need to do to complete my White 2 Pokedex, so if anyone could take a few minutes at this year's Kumoricon to do me this favor I would greatly appreciate it! Thank you very much for your time!

[wildlavender]

I've got Black 2, and I would be happy to help! I need to get the iceburg key anyway, so two birds with one stone, eh?

[Sui Kune]

Oh that's great! Thank you so much! I'll PM you once it gets closer to the con to work out a time and meeting place! (I'm staying at the Hilton, but I don't yet know if I'm arriving Friday or Saturday.)

[Manganix78]

I have both Black 2 and White 2 and I want to start at the begining again, but with Challenge Mode added for both of them.
 
Do you have that specific mode key?