Notes:

phase 1: easter eggs suggest all pixar films take place in the same universe
phase 2: do toys and robots have little people in their heads?
phase 3: cars
phase 4: cda killed alive toys for accidentally bringing them to the monster world
phase 5: all toys are dead in walle
phase 6: they actually do not take place in the same universe to begin with. each film is a fictional universe in every other universe while simultaneously being a fictional universe within it