Editing Country Club (partially found test pilot of Big City Greens Disney Channel adventure-comedy animated series; 2015) - The Lost Media Wiki
Animation Age Ghetto - TV Tropes
Regular Show (non-existent Flash pilot of Cartoon Network animated series; late 2000s-2010) - The Lost Media Wiki
Gravity Falls (Found Unaired Pitch Pilot 2010), Lost Media Archive
Coconut Fred's Fruit Salad Island (partially found unaired pilot of Kids' WB animated series; early-mid 2000s), Lost Media Archive
Gravity Falls (Partially Found Pitch Pilots), Lost Media Archive
Gravity Falls, Disney Wiki
Gravity Falls: Pilot (TV Movie 2010) - IMDb
Editing Country Club (partially found test pilot of Big City Greens Disney Channel adventure-comedy animated series; 2015) - The Lost Media Wiki
Unaired pilot, Gravity Falls Wiki
Gravity Falls, Disney Wiki