Debblun (デブルン Deburun?) is a character appearing in Bust-A-Move 3. He is a large Bubble Dragon that serves at the game's penultimate opponent. Like the other characters in Bust-A-Move 3, he is presented as a character from an arcade game, in his case called Debble Bobble, which is a parody of Bubble Bobble.
Debblun resembles a larger overweight version of Bub. He is dark green in color, and has blue spines as well as a flesh-colored stomach area. His arms and feet are a darker shade of pink, and like most Bubble Dragons, he has one visible tooth in the upper middle area of his mouth. Debblun has blue eyes, and is often seen with a smug or mischievous expression on his face.
Debblun is shown to love food, as seen in his ending in Player vs. Computer mode. He is also shown to be generally aggressive and mischievous, laughing to himself if his opponent receives extra bubbles on their screen.
Debblun has been shown to use his weight in order to attack foes, such as in his stage intro and in Jack's ending.
Debblun appears in Bust-A-Move 3 as the penultimate opponent in the game's Player vs. Computer Mode. He appears in an arcade title called Debble Bobble, and confronts the player by bursting through the ceiling. After being defeated, it is revealed that he is Dreg in disguise, who emerges from the Debblun suit in order to fight the player directly.
Despite the Debblun encountered in the game's Player vs. Computer Mode being simply a disguise used by Dreg, there is a real Debblun, as he appears alongside Dreg in several of the game's endings.
In Debblun's ending, after defeating all the other characters, he gorges himself on food in order to celebrate. Afterwards, he checks the scale, disappointed in finding out that he had gained weight as a result.
- Debblun's name is a combination of "Bubblun" and debu (デブ?), meaning "fat".