Grumble Bee was a large humanoid bee from the original Mighty Morphin Power Rangers. He could shoot acid from his mouth that could eat through anything. He can also fly and cause a sonic sound to generate from the beat of his wings.
He was made by Finster under the order of Rita Repulsa when she was trying to get to the rangers after Billy's rage at getting a B in a Science test. He manages to beat the Rangers but was eventually defeated by a Megazord. An image of Grumble Bee is used by Trumpet Top alongside of the monsters in an attempt to destroy the rangers. It is of course defeated. Later he was invited to Rita Repulsa and Lord Zedd's wedding. He is seen flirting with the Invenusable Flytrap.