Daphne Blake

Daphne Blake is one of the main characters in the Scooby-Doo franchise.

Big Scare in the Big Easy
In Season 1, Episode 4 entitled "Big Scare in the Big Easy", Daphne finds some gunk on her right shoe. She sits down and takes it off, revealing her shoeless foot. A few seconds later, she takes a spare shoe out of her purse, and puts it on her foot.

A video of the action can be seen here: https://youtu.be/4CgVhuQIOIE at the 2:35 mark.

Recipe for Disaster
In one scene of Season 2, Episode 10 entitled "Recipe For Disaster", Scooby and Shaggy are on a conveyor belt. To stop the conveyor belt from moving, Daphne takes off and throws her left shoe into the gears of the conveyor belt. Her shoeless foot only appears for a second.

E-Scream
In Season 3, Episode 14 entitled "E-Scream", A big wave of water crashes down in one scene. Everyone quickly gets in the Mystery Machine except for Daphne. Scooby then pulls Daphne into the van, and her right shoe flies off of her foot. Her shoeless foot only appears for a few seconds. She has a replacement shoe, but it's green instead of her usual purple.

Be Cold, Scooby-Doo
In one scene, Daphne removed her right boot after she and the others fell into the snow, in which when she took it off, a small bit of snow put out the fire that kept them warm.

How to Train Your Coward
During a routine monster scenario, Daphne take off her right shoe when she plans to use it as a weapon to save Scooby and Shaggy.

Halloween
In one of her hijinks, Daphne is dress like a zombie Velma, which also consists of her wearing only one red Mary Jane shoe as her other foot is sock for the entirety of the episode.

Scooby Doo: Return to Monster Island
As part of a disguise as a zombie Daphne is shown in only one of her Takemotos (her "traditional" shoes). She remains in one shoe for the duration of her time in the costume.