Worried about the Girls’ safety after witnessing their fight against an Eye Fish Balloon Monster, the Professor creates Powerpuff Dynamo, a state-of-the-art giant robot, to help them in battle. Yet, Blossom, Bubbles, and Buttercup have no reason in using Dynamo in dealing with regular emergencies. But when the Giant Fish Balloon Monster outmatches the Powerpuff Girls, the Professor forces the Girls to use Dynamo, and Townsville is soon in the middle of a huge showdown between the Dynamo and the Giant Fish Balloon Monster.