Once Upon Bowser's Insides is the third episode in the Phineas & Ferb: Bowser's Inside Story. In this one, Bowser eats Mario, Luigi and the others in Peach's castle excluding Phineas, Ferb, and their friends.
Once Upon Bowser's Insides is the third episode in the Phineas & Ferb: Bowser's Inside Story. In this one, Bowser eats Mario, Luigi and the others in Peach's castle excluding Phineas, Ferb, and their friends.