Satoshi and Go are visiting Hiun City in the Unova region. However, Rocket-Dan secretly gets there before them, intending to steal Pikachu by swapping it with their mech "Almost Pikachu", which looks and acts just like Pikachu. The problem is, when the two Pikachus start playing together and moving about, they can't tell which is which! When they do finally grab one of them, Aceburn and Lucario (who haven't been getting along very well) see this happening, chase after Rocket-Dan and rescue the snatched Pikachu, all the while being stuck together by Rocket-Dan's sticky grabber. But which Pikachu did Rocket-Dan grab and can Lucario and Aceburn learn to work together to protect the one they rescued? Meanwhile, the oblivious Satoshi, Go and Pikachu are having a great time tasting the dessert delicacies of the Unova region.