From the Super Mario Wiki
Blunder's Booth is Blunder's residence in Donkey Kong Country 3: Dixie Kong's Double Trouble!. It is located in the southeastern portion of the Northern Kremisphere, west of Kremwood Forest.
Whenever Dixie Kong or Kiddy Kong pay a visit to Blunder's Booth, Blunder will drop a hint about the Lost World somewhere in the Northern Kremisphere. The further along the Kongs are in their adventure, the more Blunder will reveal about the Lost World's whereabouts. If the Kongs haven't opened the Lost World by the time they've defeated Baron K. Roolenstein at Kastle KAOS, Blunder will ultimately share the secret.
In the Game Boy Advance remake of Donkey Kong Country 3, Blunder owns a library instead of a booth.