* Mickey Mouse is Walt Disney's most iconic creation. Mickey Mouse is synonymous with Walt Disney and the Disney brand. He is the most recognizable character associated with Disney and has been a global icon for decades. Using Mickey Mouse's image is a way to visually represent Walt Disney's legacy and his impact on popular culture.
* It is visually appealing and recognizable. The image of Mickey Mouse is instantly recognizable and appealing to readers, especially children. It creates a visual connection between the entry and the subject matter.
* It provides context for younger readers. Children may be more familiar with Mickey Mouse than with Walt Disney himself. Using Mickey Mouse's image helps them understand the connection between the character and the person who created him.
It's important to note that using a specific image in an encyclopedia is a matter of editorial choice. The editors likely chose Mickey Mouse's image because they felt it was the most appropriate and engaging representation of Walt Disney and his work.