When Billy receives his very first B, Rita send down the Grumble Bee, can't the plan with...Billy & Trini in the plan. Grumble Bee was created by Finster for Rita Repulsa, sent to mock Billy after receiving his first "B" on a test. Attacking Billy and Trini, Grumble Bee put up quite a fight, flattening the two Rangers with his powerful sonic attacks. Alpha created a device for Billy to use against Grumble Bee, blowing some kind of foam on the monster, disrupting his sonic attacks. When the other Rangers arrived, Rita made Grumble Bee grow, but he was destroyed by the MegaZord's Power Sword.
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