I got up to 68 but I have a feeling there is probably more.

Now we know where Miyazaki got all of his ideas.

I'd like to imagine that these two drivers are friends and have been constantly annoying each other in a Tom and Jerry fashion the whole day.

The article from your link says that the circumference is 43 inches, and the diameter of 35 centimetres (14 inches).

I don't have a guess as to what it could be, but Google Images seems to think it's a Cachorro Yorkshire Terrier, and that's good enough for me.