Rumbler, a thunder fifi, is Nimbo's older brother, and gives off a blue energy.
Thunder Fifi

Thunder Fifi. Thunder fifi is currently using an electrically charged sound wave.


Rumbler can unleash a booming shock wave of sound energized with electricity by shouting at a very loud tone. These sound waves are somehow high enough to shatter glass, and yet low and loud enough to become physical and send a target flying. Rumbler is the only thunder fifi known to have perfected this useful technique.


  • Music (he carries an MP3 player that was made invisible.)
  • Any loud noises
  • Thunder (DUH!)