Bubble Dragons are a species that exist in Bubble World. They are a type of dragon that can breath bubbles from their mouths, noses and have a general "bubble" ability. A lot of notable bubble dragons are benevolent in the Bubble Bobble Universe, but not all of them are good by nature. Generally, bubble dragons are colourful creatures, usually consisting of one single colour with a secondary colour balancing them out, but they can be of any colour of the rainbow. They usually (but not always) have a single pointed tooth or two fangs, and a row of spines beginning on their head and continuing on down their backs and tails. A lot of bubble dragons also used to be human, and became bubble dragons through curses placed on them by magical species of monsters in their realm.
Some evil bubble dragons are known as Warurin. You may also be looking for Dragons, which are a seperate type of dragon from the Bubble Bobble Universe.