Phelan Flynn

Phelan Flynn is Goth's version of Phineas's father.

Phelan was a Jedi (as revealed in Phineas and Ferb Space Wars: Episode 4 and The Fate of Phelan Flynn) who came to dwell on and protect Earth.

He met and fell in love with Linda (who coincidentally had the same last name). They later married and had two kids: Candace, and Phineas (who was named after Phelan's brother).

They also adopted a dog named Bucky who later got sick, and ran off to live somewhere else until he died.

Later on, Danville was attacked by members of the Dark Side and Phelan was killed when he fought them.

His ghost sometimes appears in stories (usually to Phineas). He offers advice and guidance, and even defeats an enemy in a possible future story by Goth.

Trivia
He is gone, but sort of lives on in his son, Phineas. (Sounds like Lion King, doesn't it?)

He was a Jedi that may have lived years after Star Wars took place.

He looks almost identical to Phineas, except he wears different clothes and his hair is the same color as Candace's hair.