Ferbnessa is the canon, one-sided, pairing between Ferb Fletcher and Vanessa Doofenshmirtz.
- "I Scream, You Scream": First interaction. Ferb develops a crush on Vanessa.
- "Vanessassary Roughness": Ferb helps Vanessa throughout the episode and she gives him a kiss on the cheek as a "thank you".
- "The Chronicles of Meap": Ferb flirts with Vanessa in a spaceship he repairs, and she seems impressed.
- "Phineas and Ferb Summer Belongs to You!": They shared a scooter ride to the Eiffel Tower. While there, Ferb gave Vanessa advice to deal with her father and bought her a rose.
- In "Act Your Age" they are seen dating each other.