What's in there?
It's a toggle for some sort of RSS feed, linking to sites and Twitter accounts such as Nintendo Life and Wario64.
It's displayed at the bottom of the page, and is managed by a chain chomp with a bow on their head.
The only issue is that it looks like it only displays properly on the front page and similar areas. The Chain Chomp will follow you into a proper thread, they just can't display the news for some reason.