Which Disney characters joined Mickey Mouse in cartoons during the 1930s?

During the 1930s, several iconic characters joined Mickey Mouse in his cartoons. His girlfriend, Minnie Mouse, appeared alongside him in his earliest shorts, such as Plane Crazy (1928), and remained a regular presence.12

As the popularity of the Mickey Mouse series grew throughout the 1930s, the studio introduced other animal characters who became his regular supporting players, including:

• Donald Duck: An ill-tempered, squawking duck who became one of Disney's most famous characters.13
• Pluto: A dog character who became a staple of the Mickey Mouse cartoons.14
• Goofy: Another dog character who joined the ensemble of supporting players.14

These characters were developed as part of the studio's expansion of animal figures with human-like personalities, which resonated strongly with audiences during the 1930s.14