Taimu surippa!/Fushigi na Aka-chan

With one of Dr. Slump's crazy inventions—namely the Time Slipper—Arale and her new friends set off on a journey to prehistoric times. There they experience terrifying adventures with aggressive dinosaurs. But Arale knows neither fear nor scruples: she skillfully knocks out a particularly nasty dinosaur and saves Senbei's life at the last minute.