B Fighter is an enemy tank that appears in Bubble Tanks and Bubble Tanks 2. It is armed with a Basic Cannon, has 7 health, and drops 5 bubbles upon popping. It first appears at least four bubblefields from the starting point.

When B Fighters are present in a session of Bubble Tanks 2, no L Fighters or S Fighters will appear, with the exception of some L Fighters appearing alongside the tank Rotating Machine Gun.