Freaky Gwen Ben is the twenty-fourth episode of the first season of Ben 10and the 24th episode overall.
When Max, Gwen and Ben arrive at a fest, Max gives Ben and Gwen each Ten Dollars to spend. They plan to use their money together to buy something really good, and they search many shops for suitable things. Then finally Ben spots a Sumo Slammer Slushie Machine in a shop and pleads to buy it, when Gwen spots a rollerskate set and wants to buy that. Then somewhere else Hex is searching for the Titan Earth Gloves, and turns things into monsters to hurt the people. Then Ben and Gwen find it in the same shop, but they don't buy it. But they finally get to know that Hex is harassing the people and Ben transforms into Diamondhead, but fails capturing Hex. Then Hex uses a spell to swap Ben and Gwen's bodies, much to their shock. Then Ben, as Gwen spots the gloves, and plans to use them to defeat Hex. Then Gwen transforms into Four Arms and finds Hex, who grabs the gloves from Ben and captures them. Then Gwen transforms into Upgrade and weakens the strength of the glove and Hex gets caught by the Police, then Ben and Gwen's bodies swap back to normal. Then the shopkeeper rewards Ben and Gwen with a Sumo Slammer Slushie Box and the Rollerskates for saving the day, and takes Hex's spell book to sell.
The hat that Ben wore looks exactly like Wildmutt's head.
The spellbook used by Hex is exactly identical to Gwen's Spellbook from the original series. Not only that, the spell used to switch the bodies of Gwen and Ben is also exactly identical (the drawing in the book) as that in A Change of Face.
The title references Freaky Friday, which is also about body swapping.
This episode aired as the 4th episode in U.K.
This was aired as the second episode in Australia and Asia.
This episode is based on the original series episode A Change of Face where Ben and Gwen swap bodies as a result of magic. However in that episode, it was done by Charmcaster, Hex's niece, while in this episode it was done by Hex himself.