Phineas and Ferb attended a sci-fi/fantasy convention where fans of Stumbleberry Finkbat held an intense rivalry with the "Speckie" fans of Space Adventure. Though Phineas and Ferb spent the convention trying to make peace between the two factions, Ferb was nevertheless lumped in with the Finkies due to his costume. The Finkie leader was Buford, opposite Baljeet on the "Speckie" side ("Nerds of a Feather").
Not much is known about the movies themselves, other than the various elements and characters seen or mentioned among the Finkies. Though it is unclear how many films there are, two are known by name (Stumbleberry Finkbat and the Whining Wand of the Turtle Wizard and Stumbleberry Finkbat and the Lost Shadow of Darkling Tower).
Stumbleberry Finkbat is a parody The Lord of the Rings and Harry Potter.
As with any long-running successful franchise, Stumbleberry Finkbat trading cards have been shown to exist. At least one of these was appropriated by the O.W.C.A. as a holoscreen for Major Monogram. ("Bully Bust")
- Buford, leader of the Finkies at the convention, who dressed up as a barbarian/warrior character named Odof Underhump.
- Ferb, who dressed up as an elf prince named Hymie Silverman.
- Albert, who dressed up as a green dragon.
- Unnamed Pinhead Pierre actress, who was some kind of warrior in the Finkie army.
- Phineas, though he did not attend the convention in a costume from the movies.
- In Canderemy, Isabella asked Phineas if they wanted to see the latest Stumbleberry Finkbat film. It is most likely that she just picked a movie that she knew Phineas would want to see, not specifically that she's a "Finkie".
- Buford's replacement nerd