From The Pixar Touch, by David A. Price:
Andrew Stanton, Co-Director of Finding Nemo, “…also spoke of a spiritual aspect to the relationship of Marlin and Dory. Dory was, literally, an angel fish. ‘The protagonist’s battle was to overcome fear by discovering faith, and certainly Dory represented the angel, or the helper who showed him how [...]
First, a word.
If you have not seen Wall*E, feel free to spend some time reading my little meditation on why Pixar is the greatest thing ever, but be warned: the actual review of Wall*E, the movie, is spoiler-tastic, filled not only with key plot points, but my opinions on the aesthetic choices of those plot points. [...]