Has anybody ever wondered about this difference?

[withheldforprivacy]

During Kaiba's fight against Ishizu, when the millenium rod releases Kaiba's memories,
Kisara is shown shoeless. Later, during millenium world arc, when, at the same scene,
Kaiba is carrying Kisara's body, she's wearing shoes.

 

[Captain Cadaver]

Whilst I haven't read the manga beyond the pre-Duelist Kingdom material, I'd assume it's most likely due to the Ishizu scene likely not showing Kisara's feet, so the animators just had to make a (wrong) guess.

 

[Papasmurf]

They completely retconned Shadi's character and the creation of the millennium items so this isn't too surprising lol