Toad is a great example of a very cute character. What drew me to him most of all was his animation (as detailed above). The animation seems very nuanced. He seems to be a little worried, shouting like a kid. He is energetic and excited. He squishes down to a crouching form, a sweet little mushroom boy.
Toad is a colourful, expressive creature. The restrictions of pixel graphics have produced incredibly expressive work and show that simplicity of design does not denote lack of depth. The ideal cartoon form must strike a balance which allows it this depth of character in spite of its simplistic form.