As the Great Day of the Flyers nears, the Great Valley's flying youngsters are eager to participate in the annual exhibition to show off their skills. Everyone, that is, except free-spirited pterodactyl Petrie, whose individualism causes problems when it comes to staying in formation. Enter his dinosaur pals Littlefoot, Cera, Spike and Ducky, who encourage Petrie to embrace his uniqueness.

Ensemble cast of off-the-wall Warner Brothers characters, appearing in a wide variety of roles. Wakko, Yakko, and Dot Warner, are WB Studio creations who were just too "zany" to be of any use to the studio. Pinky and the Brain are two mice bent on world domination. Rita and Runt are a cat and dog team, who get into perilous situations every episode, put always seem to find time to sing a song. Bobby, Pesto, and Squit are the Goodfeathers, part of a New York mob of pigeons, who worship Martin Scorsese. Slappy the Squirrel is a late middle-age squirrel; she starred in a series of popular cartoons in the Golden Age. Buttons is a watch-dog, charged with watching the mischievous toddler, Mindy. Chicken Boo is a giant chicken trying to integrate into human society. Flavio and Marita are two urbane hippopotami.