第23話: せんべいが若者用ドラッグを製造し、アラレとガッチャンがバイク乗りに加わる

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Once Senbei hears Midori is coming to his house, he decides to make a rejuvenating drug to make him look young. Once he drinks the drug he becomes way too young!! Arale and Gatchan join a biker gang, but actually they are milkmen!! (Source: Wikipedia)