Well, if you saw Phineas & Ferb 2nd dimension then perry the platypus saw them kiss at the end. Also perry has seen those little things isabella does, like ask him for help and blush at him from doofenshmirtz blimp, building etc. So he probably has.
Nope Phineas Ends up keeping Perry
Phineas (main character)Ferb ( Phineas step-brother)Candace (Phineas older sister)Isabella (Phineas best friend)Perry the Platypus (pet)Doofenshmirts (evil)Linda (mom)Laurence (dad)Vanessa ( doofenshmirts daughter or Ferb's crush)
Perry the platypus
Oh, There You Are, Perry
They had Perry for 5 years.
Ever since they were really young. To see them get Perry, watch Phineas and Ferb Across the Second Dimension.
Perry, perry the platypus, or agent P
Dee bradley bakery plays perry
Oh, there you are perry
I CAN'T BELEIVE YOU DON'T KNOW PHINEAS & FERB'S PET'S NAME!!!!!!!!!!!!!!!!!!!! Answer: Perry (Agent P in secret agent form)
5 years
Major Monogram