SPD Yellow Ranger had to the cover her ears, about the ultrasonic waves of Grumble Bee - to say are you okay Billy
Blue Ranger had to the cover his ears with SPD Yellow Ranger, about the ultrasonic tones of Grumble Bee - pr-zyu2 - ep51 style

Grumble Bee's Ultrasonic Buzzing (effect as Z and Billy)

Grumble Bee's vibrating wings could send yellow pulses of energy through the air, and his buzzing afterward was extremely irritating to the Rangers' ears through their helmets.

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