1x26 - Be Cool, Scooby-Doo!

Fred is put on trial after he is wrongfully accused of dressing up as a toxic waste mutant. The trial goes further awry after Fred is accused of inventing every mystery he has ever solved. Though Daphne agrees on being Fred's defense lawyer, her and the rest of the gang's antics serve no help to Fred, who risks being put away in prison if charged with the crime.