They are allowed to use other people's intellectual property because "Parody" or "Satire" falls under The Freedom of Speech.
It could also be as simple as they asked if they could & they were given permission.
Charlie Brown in the Peanuts cartoon
a cartoon artist for the army and for playboy
Sabrina the Teenage Witch Sabrina the Teenage Witch
Alvin and the Chipmunks are cartoon characters. They begin with the letter A.
If you mean 'The Blockheads' , the two are mischievous characters from 'Gumby' . There is also a webcomic by Michael Swain titled 'Blockhead' . Charlie Brown was regularly called a blockhead by the other characters of Peanuts
cartoon artist athuor of many poet and childrens books
marvin the martian and other cartoon characters that wear roman greek clothes
For information regarding characters on the cartoon 'Horseland' see the related link below .
If you are referring to the cartoon characters from the Simpsons, the answer is Itchy, the cartoon mouse.
the hottest cartoon mom is marge simpson.
Your question cannot be answered, no single person created cartoon characters. Please edit your question if you're referring to specific characters.
Typical characters that someone might find on cartoon shopping bags would include cartoon characters from famous television shows such as Bugs Bunny or The Simpsons.