Suggestion: you've only posted a few times here on PokéCommunity. Not sure what to do next?

[yasu]

In this box that appears it says I should post in the DPPt discussions, although this is now an archive. So I assume this box is outdated? Should it not link to the BW forums instead?

 

[Gymnotide]

What "box" are you referring to? o_o

 

[PokéSwimmer]

The forum was merged with the HGSS board we had, so it is all under "Fourth Generation Games."

The OP is not asking where the forum is. She is pointing out an outdated feature in the forums.

What "box" are you referring to? o_o

It's like the "announcements" we have at the top of the forum. Such as this one:

New Feature
Ever get annoyed with the clutter shown in posts? Want to see less information about members when viewing threads? Visit the Edit Options page and scroll down to the Thread Display Options section. There's a new feature that allows you to show or hide as much information in posts as you'd like (post count, join date, nature, and more.)

The box the OP is referring to is something that appears for new members only. It's outdated because it links to the old DPPt forum instead of the BW forum.