Not a Disney/Pixar design!
WALL-E was patterned (strongly) after the "Johnny 5" robot in the earlier film, "Short Circuit." It is not a "Disney/Pixar" design.
I have great respect for the Pixar folks who happily admit their inspirations but none at all for Disney who has been ripping off the public treasury of tales, slapping their name in front of it and promoting it as if it were their own original creation since the 1940's.
Local classical music station ran a program about movies using unattributed classical compositions to make their "own" movie music. Guess which company supplied most of the examples? The melody of "Hi-ho, hi-ho it's off to work we go ...." was written by Mozart. Yes, that Mozart.