Sushi Pack - Season 2 Episode 8 A Very Big Deal
Overview: Tired of being only two inches high, Ikura inadvertently gets his wish to be bigger when Dr. Naught's malfunctioning shrink ray turns him into a giant. But being that big has its own problems, as Ikura learns, and it is only when he shrinks down to his original size that he's able to help defeat Dr. Naught's giant robot.