- “Owwwweeee! Oh, I'm hurting! I have to get out of here!”
- —Tubba Blubba's Heart, Paper Mario
Tubba Blubba's Heart is, as the name implies, Tubba Blubba's heart. Tubba Blubba became invincible when his heart was magically removed by Bowser. Hiding in the Windy Mill, the heart controlled Tubba Blubba as if he was a puppet. However, Mario discovered the hairy heart, and the two battled. It is one half of Chapter 3's boss. It has 50 HP, no Defense and a 6-Damage Attack that doubles when charged.
When Tubba Blubba's Heart HP reaches around 5 HP, he runs away from Mario and escapes the undergrounds of Windy Mill. When he reaches the surface, he sees Tubba Blubba outside and reunites with him. Tubba Blubba gulps down his Heart and becomes vulnerable with his heart inside his body.
Tubba Blubba's Heart is seen in the parade after the player beats the final boss, chasing his body when three Boos carry Tubba Blubba away.