Monsters Inc - The Archetype Hero's Journey

The Hero:

Sully - A scarer who is close to breaking the all-time scare record

The Mentor:

Waternoose - Trained Sully at scaring.

The Herald:

Celia Mae - Announces when Sully has beaten the all-time scare record.

The Shadow:

Randall - Sully's rival for the all-time scare record, who is also behind a scheme to kidnap children.

The Threshold Guardian:

Roz - In charge of which doors Sully goes through, and is also in charge of the organisation stopping him from looking after Boo.

The Trickster:

Boo - A human child who accidentally follows Sully into the monster world and is the cause of all the problems following.

The Shapeshifter:

Waternoose - The CEO of Monsters Inc. who trained Sully but later turns out to be working with Randall trying to kidnap children.

Allies:

Mike - Sully's assistant who is with him throughout his entire journey.
The Abominable Snowman - He helps Sully and Mike when they get banished from the Monster world.

Cars - A Hero's Journey

Ordinary World: 

The ordinary world to the hero is the world of racing.

The Call to Adventure:

Hero's world is suddenly changed when he falls off the back of his lorry and ends up in Radiator Springs.

Refusal to the Call:

Wants to get back to his world of racing.

Meeting the Mentor:

Meets Doc Hudson, who he realizes is the Hudson Hornet, a famous racer.

Crossing the Threshold:

Commits to staying to fix the damage he caused.

Tests, Allies and Enemies:

Forms friendships with the people in the town and is tested by Doc Hudson.

Approach:

Being trained on a dirt track to try and get better at racing.

The Ordeal (Death and Rebirth):

Finishes fixing the road, but gains a new respect for the town and the people who live there.

The Reward:

The friendship of the town.

The Road Back:

The championship race, now has the support of his new friends as his new pit crew.

The Resurrection:

When he could win the race he stops and goes back to push Weathers over the finish line so he can finish his last race.

The Elixir:

Starts up his headquarters in the town to bring tourists back to the town and save it.