Dreams of seeing someone as a cartoon character symbolize that you don’t take them seriously or that you think they laughable.
To see a specific cartoon character in your dream represents that you are embracing the larger than life qualities that you ascribe to them. Consider the qualities that this cartoon character represents to you.
For example, if you dream of Sponge Bob Square Pants, this might symbolize your overzealous, “I’m ready for anything” attitude.... Strangest Dream Explanations
If the cartoon character was one that you know well, such as Mickey Mouse, Donald Duck, or Bugs Bunny, then you need to ask yourself what that particular character suggests to you, and how that applies to your present circumstances.
If the cartoon character was just a simple, unknown figure that entertained you, this suggests romantic troubles ahead.
The antics of the character can give hints as to how to avoid these troubles.
Success in business.... Dream Explanations of Astro Center
Seeing a cartoon world in your dreams or seeing cartoon-like people suggests that your unconscious is sending up messages which are telling you something about the way you perceive the world.
The cartoon people, or cartoon characters, suggest that you may perceive yourself and those around you as comical or as not having much validity or seriousness. Your perceptions may be somewhat off due to your inability to look at the way things really are. Your mind’s eye distorts things so that you are more comfortable with what is going on around you.
If your world is full of stress and this dream made you laugh, consider the compensatory nature of it. In your dream you may be able to obtain moments of lightheartedness and fun.... The Bedside Dream Dictionary