I saw someone make a "THIS IS A NO ANIME ZONE!" joke in a video where Sully yeets Vanitas through multiple doors, and now I'm imaging that the real reason why Donald changed everyone's appearance is so Sully wouldn't do the same to Sora.

With Sully getting revenge on all anime kind for the death of Mike.

Cue Light & Darkness scene with a Door in between Sully & Boo.
Boo: Did you do it
Sully: Yes…
Boo: What did it cost?
Sully:Everything…