Finding the Flying Ford Anglia/Meet Figge/Talk with Thorax, Pharynx, and Scotch

Here is how the Changeling Trio was formed in Princess Yuna's Adventure Begins.

That night, Yuna, Flurry Heart, Dipper and Mabel enters a forest in the dark.

Princess Yuna: It sure is dark in here.

Princess Flurry Heart: I don't know why you and Mabel talked us into it, Dipper.

Dipper Pines: Relax, Flurry Heart. It's just a quick exploration before we leave.

Mabel Pines: Dipper's right. Besides, What can go wrong?

Suddenly, An engine sound was heard.

Princess Flurry Heart: What's that noise?

Princess Yuna: I think there's something moving up there, Listen. I think I hear something big.

Dipper Pines: Big.

Mabel Pines: How big?

Just then, They've discovered something mysterious.

Princess Flurry Heart: Guys, Look at this.

The mysterious object was revealed to be a damaged Flying Ford Anglia,.