Mouse, as a character, was not by himself. There were many other characters
that were created to be in productions with Mickey. Minnie was one of them.
She was with him in Steamboat Willie. During this production,
Pluto came along and was known as Minnies dog. Pluto was always with
Mickey and they went through many adventures with each other. Then along
came Goofy who acted like Mickey but was clumsier.
As time went on, Mickey became less popular as other characters were created by Disney, such as Donald Duck. Still, today people know Mickey for his charm and its kindness. Mickey Mouse is known as the most famous mouse of all time, and is the most famous character of Walt Disney.