In the scene in Batman & Robin where Robin is going to kiss Poison Ivy, he is wearing the dark blue and dark red costume he wore throughout the whole movie. In the next scene when Batman, Robin, and Batgirl are fighting Mr. Freeze and Bane, he is wearing a silver and black costume. But in the next scene when they are all back at the Wayne mansion giving Alfred his medication, Robin is wearing the original dark blue and dark red costume and Batgirl isn't wearing a costume at all. Either Robin and Batgirl had time to change or the directors made a pretty big mistake.