NEW PROMO Season 5 T-Shirt Phineas & Ferb Perry Platypus Disney Channel Large. My understanding is that this promotional exclusive item was sent as a gift to various people and/or companies from the Phineas and Ferb PR team in promotion of the new Season 5 on Disney Channel! Shirt is a Size Large and has never been worn. Thanks for looking and feel free to ask any questions that you might have!