Goofy (LotK)

Worlds With Change

 * Pride Rock -- a land turtle with a shield.
 * Halloween Town -- frankenstein.
 * Atlantica -- a sea turtle.
 * Monsters, Inc. -- N/A
 * Nottingham -- N/A
 * The Royal Forest -- N/A
 * HQ Tree -- N/A

Worlds With Change (but with very little change)

 * Timeless River -- Black and White
 * Space Paranoids -- Neon Blue and black
 * Eyrie Building -- N/A

Donald
He is Goofy's long time buddy.

Mickey
He is Goofy's best friend.

Sora, Riku and Kairi
They are Goofy's friends.