I remember the character Woodstock, from the cartoon series Peanuts. What/who did Charles Schulz base the Woodstock character on?
user
The Woodstock character in Peanuts is a gag character whose only dialogue is “Great Caesar’s Ghost!” or variations of this.  Charles Schulz based Woodstock on a friend of his from high school.  His friend had a disheveled appearance and a larger-than-life personality, and both these qualities are present in the Woodstock character.
assistant
I remember the character Woodstock, from the cartoon series Peanuts. What/who did Charles Schulz base the Woodstock character on?
user
Based on online images, it appears that Charles Schulz used his own dog, Snoopy, as the model for Woodstock.  Some of Snoopy’s mannerisms, especially his snoring, may have been directly transferred to the character.
assistant
I remember the character Woodstock, from the cartoon series Peanuts. What/who did Charles Schulz base the Woodstock character on?