Tubba Blubba's Castle
Tubba Blubba's Castle is the residence of Paper Mario's third boss, Tubba Blubba. The castle is massive to fit Tubba's huge size, but poorly designed to hold his weight. It's at the top of Gusty Gulch, beyond the windmill where Tubba Blubba's Heart resides. The castle resembles a hacienda of medieval Spain. It can be very confusing because it's three stories high and the areas look relatively the same.
The castle is filled with Clubbas, and flying sentinels that will carry Mario to the front door outside. Using Lady Bow's cloaking move is the best way to avoid confrontation. In Chapter 3 of the game, Mario and Lady Bow explore the castle and finds a key named Yakkey before they are caught. They then flee the castle.
Mario and his partners head for the castle in Chapter 3 in order to find Tubba Blubba's weak points. At first, only the west door in the hallway is unlocked. By going all the way left and taking the stairs to the north, Mario is able to find the Castle Key in the basement which allows him to go right from the lobby and then upstairs. In the basement, there hides a Boo who has sneaked in to find Tubba Blubba's weakness. He warns Mario not to directly fight Tubba Blubba until his weak point is found. With the help of two additional Castle Keys, Mario reaches Tubba Blubba's bedroom. When Mario grabs Yakkey, the key in Tubba's bedroom, it will reveal the secret as well as waking up Tubba Blubba. Tubba will chase Mario out of the castle all the way down to the Windy Mill. The thin wooden bridges across the main lobby will crash when Tubba gets on them, giving Mario a shortcut to the bottom.
Tubba Blubba is defeated near Windy Mill after his heart is beaten at the end of Chapter 3. He then spits out all the Boos he ate and and runs away. If Mario checks the castle afterwards, he will find that the Clubbas and the Sentinels all missing, except that one Clubba is sleeping by wall corner in the room east of the lobby since he is really tired. However, the bridges across the main lobby will be fixed, in order to give the player a chance to collect the missing Star Pieces and Badges. If the player finds Herbert (a Boo eaten by Tubba Blubba) in Gusty Gulch after the defeat of Tubba Blubba and talks to him, he will reveal that his ancestors once lived in the castle.
One of Goombario's tattle says that he is mad that an area/corridor in the castle is bigger than his house. This may mean Goombario is jealous of the Castle.
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