After Toy Story’s first movie, I have noticed that almost all Pixar movies have a cameo of the Pizza Planet truck, like in Incredibles and Finding Nemo. I’m just wondering why is Pizza Planet became famous?
It’s an in-joke that they try to work into every film (eg. A113, Dinoco); however, as much as I love PP’s inclusion in the first Toy Story, I do find the constant insertion of it into every film to be extremely cumbersome.
It’s just their thing. Having in-jokes and references. Like having John Ratzenberger in every movie.
If you found the Pizza Planet truck in “The Incredibles”, I think you need to share with the rest of the class! 
I believe the Pizza Planet truck is not in The Incredibles.
In one of Jonas Rivera’s videos about easter eggs, he said the Pizza Planet truck is in ALMOST all of the Pixar films.
I thought it were in The Incredibles. I saw a thread about that in the Incredibles section. 
Powerful- That was a thread with a lot of people searching for the Pizza Planet truck and failing. 
I really like it as in-jokes go, because it takes you right back to Toy Story and makes you realise just how far Pixar have come.
I think it is in The Incredibles! In the Cars commentary, John Lasseter himself says that it’s in every Pixar film.
woody- As far as I’m aware, someone on the boards (I can’t remember who- terrible memory) said that one of the Pixarians (can’t remember which one- I told you I had a terrible memory ) had confirmed that it isn’t in The Incredibles. It should say somewhere in the thread about all this stuff, but yeah, it’s disappointing if that’s the case.