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Super Sushi is a powerful food product created by Dr. T. Garden. Whoever eats it becomes powerful and grows twice their size. It is unknown how they are made, though they are required to be used in a microwave-like device.
In The Super Mario Bros. Super Show! episode "Mario Meets Koop-zilla", King Koopa, after Dr. T. Garden creates his most powerful batch of Super Sushi, steals and devours it, causing himself to grow gigantic in size. Super Sushi later appeared in the episode once more, when Mario, believing eating Super Sushi to be the only way to defeat Koopzilla, has Dr. T. Garden make him a batch of it, which Mario eats with spaghetti.
Dr. T. Garden later created a cure for the effects of Super Sushi, the liquid Super Sushi Shrinker, which must be administered via injection to someone who has eaten Super Sushi in order to reverse the enlarging effects of it.