I am sure you've seen some of this art work before, but it is good to compare Pinocchio's development beats in one row. I don't know who drew this preliminary model sheet, it is reminiscent of the original book illustrations by Enrico Mazzanti.
The second sheet starts to show feature film qualities, it looks like Fred Moore might have had something to do with this version. Quite a bit of animation was done using Pinoke looking like this, but Disney wasn't satisfied.
An early color model cel with a still unrefined Geppetto.
Here Milt Kahl comes into the picture. He drew these poses after having animated a test scene featuring Pinocchio under water. (Which is sort of an odd choice for selling a new character design as far as environment).
Anyway, we all know that Walt loved Milt's model, and the rest is history.
Milt was right, a little kid personality is more important than the wooden marionette look.
Bob Jones created character models like this head of the title character.
A cel set up from the final production.
If you want to find out about the film's Making of, get J.B. Kaufman's fantastic book:
Pinocchio, the Making of the Disney Epic.
For a Milt Kahl pencil test, go to the bottom of this page:
Images Heritage Auctions