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The aliens decide to use special chimera animas to release pollutants into Tokyo Bay. The Mew Mews arrive, sans Lettuce, and find themselves having to fight numerous smaller chimera animas made from fish. Mew Lettuce and Ryou arrive by boat, but the larger monster destroys it and they are thrown into the water. While the others defeat the fish monsters by combining Mint and Pudding's attacks, Lettuce tries to save the drowning Ryou. Her emotions activate the mew aqua around his neck, causing her legs change to a porpoise fin and easily bring Ryou back to the surface. The mew aqua weakens the remaining chimera anima, enabling them to defeat it.
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