Aaron Hartline is an animator for Pixar Animation Studios and a teacher at Animation Mentor, so these doodles probably took him mere seconds to make.
Some characters you may be familiar with in these Aaron Hartline creations include Winnie the Pooh dressed up was Harry Potter, the Comic Book Guy from The Simpsons and Tweety Bird from Looney Tunes.
Implications - Consumers enjoy seeing cartoon characters because of their nostalgia value, reminding consumers of their youth and simpler times. This, in turn, acts as a stress reliever. Corporations may consider using cartoon characters in media campaigns in order to evoke a similar sense of ease and comfort from consumers.