Danny Phantom S3 Ep 5 - Gender Transformations

Season 3 Episode Forever Phantom
Amorpho himself is trying in vain to resort to his original form but cannot. By the time the smoke clears, Danny and Amorpho head to the kitchen and turn back into their true forms. Amorpho apologizes for his actions and Danny, getting him off the hook, just states that as long he leaves town, he won't bother him. Amorpho agrees, then again morphs into Danny Phantom before leaving, stating how will Danny know if he ever walks back into town.