Question: In what film does a dad journey to 42 Wallaby Way, Sydney to find his son?

Answer:

Finding Nemo (2003). Marlin, the clownfish who isn't funny, makes his way to his son at 42 Wallaby Way with the help of the forgetful fish, Dory. Despite being together for most of the film, Dory never calls Marlin by his name and rarely remembers his son's name correctly. Finding Nemo is not the first film appearance for Nemo. Pixar is known to plan characters well in advance. Nemo first appeared as a stuffed toy on a couch in Boo's room during Monster's, Inc. (2001).