Bubbles

Bubbles as depicted in the Sonic 3 manual

Bubbles is a puffer-like badnik found in Marble Garden. It is similar in both behaviour and appearance to the Pointdexters found in Hydrocity Zone. They are primarily blue in colour. Bubbles are known for their spikes, which they can retract and protract at ease. Bubbles can also float in the air, meaning they can be a difficult badnik to predict. They can only be defeated if they are hit without their spikes showing. Attempting to hit a Bubbles badnik while they have their spikes protruding will result in the loss of a shield, rings, or a life.