This is how the Launchpad McQuack costumes have changed over the years in the parks.

Photo Years Description
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1987-1991 Launchpad almost resembles his animated version. This costume was last seen in A Day at Disneyland in 1991.
Launchpad McQuack HKDL
1990-present Launchpad's head becomes rounder, his eyes become smaller, and his scarf is shorter and wider.