Tubba Blubba's Castle
Tubba Blubba's Castle is the residence of Paper Mario's third boss, Tubba Blubba. The castle's rooms, halls, and furniture are sized proportionately to Tubba's size. It is at the top of Gusty Gulch, beyond the windmill where Tubba's Heart resides. The castle resembles a medieval Spanish hacienda.
The castle is staffed by Clubbas, along with unnamed 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 while searching for Tubba Blubba's weakness. They find the talking Yakkey, who awakens Tubba Blubba and leads to the party's escape from the castle.
The in-game map description reads, "The Invincible Tubba Blubba lives in this castle." Upon Tubba Blubba's defeat, this is changed to "The Once-Invincible Tubba Blubba used to live in this 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 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 reveals 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 stamps 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 are all gone, besides one Clubba sleeping in the corner of the eastern corridor who doesn't seem to mind Mario's presence or his fellow Clubbas' absence. This Clubba also disappears after Chapter 4, around the same time a similarly noddy and lazy Clubba appears in Peach's Castle to help secure it. The bridges in the castle that were destroyed during the chase 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 once 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.
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