It's Ronald's birthday and Hamburglar, upset that he didn't get Ronald a present, invites everyone to a fake amusement park known as "Birthday World" to celebrate, run by an evil mad scientist named Professor Thaddeus J. Pinchworm. Everyone is amused at first, but they can no longer escape and no longer fall for the poor designs of the rides until they ride a rollercoaster which turns them into babies (both Franklin and Tika are wearing diapers) and they need to find out how to return to their original ages, even though their certain abilities are limited since they are toddlers.
Lorraine Gallacher
Writer
David Regal
Writer
John Holmquist
Director
Joe Maggard
Ronald McDonald
Dee Bradley Baker
Sundae / TV Monitor (voice)
Christine Cavanaugh
Birdie (voice)
Kevin Michael Richardson
Grimace (voice)
Pamela Adlon
McNugget #1 (voice)
Lisa Raggio
McNugget #2 (voice)
Charlie Adler
Hamburglar / McNugget #3 (voice)
Jazmine A. Corona
Tika (voice)
Phil Snyder
Professor Pinchworm (voice)
Pooh's Heffalump Movie69%
Revolting Rhymes68%
The Monkey King65%
Rugrats Go Wild63%
The Loud House Movie72%
Phineas and Ferb the Movie: Candace Against the Universe72%
Minions & More Volume 170%
The Twits58%
Plankton: The Movie68%
Pets United59%
Monster Family 266%
Hey Arnold! The Jungle Movie76%
Wonder Park65%
Ron's Gone Wrong78%
The Boxtrolls67%
Chickenhare and the Hamster of Darkness72%
Mickey's House of Villains73%
Scrat: Spaced Out63%
Smurfs: The Lost Village63%
A Tooth Fairy Tale85%
