phineas decides 'good news, Isabella you can come with me by default because where we're going we'll be taking the beak suit.'
Isabella asked 'where are we going '
phineas replied 'to metropolis to hang with a family of 5 super heroes, mr. Incredible, Elastigirl, Dash, Violet and Jack Jack. However we're going to the beginning first back when it was just mr incredible, elastigirl and their friend frozone.' When they arrive, Mr. incredible notices their presence right away and asks 'who are you my fowl fellow super ' phineas answers 'you may refer to us as the beak' cut to the night of mr. Incredible's wedding phineas says 'mr. incredible you should get going, I got bomb voyage.' it's an epic but completely one sided fight bomb voyage throws bomb after bomb at the beak but can't hit him resulting in the beak smashing bomb voyage's face in. part 2 is when phineas and Isabella step outside of the beak suit to join the parr family in their daily life.