Donald Duck (comics)

Heavy Duty (Walt Disney's Comics and Stories #537, 1988)

Daisy Duck holds a weight contest, in which the heaviest resident of Duckburg can win their weight in gold, courtesy of the Gobblemore Foundation. Upon mishearing a phone call, Donald Duck decides to gain weight just to win Daisy's affection, but only before mishearing again that he is just too heavy for her.

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Fast Away Castaway (Walt Disney's Comics and Stories #640, 1988)

Gyro Gearloose invents a machine that creates infinite ice cream

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Unknown comic published in early 2000's in the polish "Kaczor Donald" magazine

In this comic, Donald fattens up a thief in order to escape from being held hostage by him.

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Wintertime Wager

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A Blow For Good Taste (Anders And & Co. #21, 2009)

Gyro Gearloose invents the "Tastemat", a machine that can make everything taste good. This makes several residents of Duckburg fat.

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Source TBA

In one story, Hewey, Louie, and Dewey all become couch potatoes and gain a lot of weight.