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Robotnik's attempt to cause Sonic to age rapidly with his newest device backfires, turning him and Tails, and later himself, into babies.
Episodes
1Best Hedgehog 2Tails' New Home 3Birth of a Salesman 4Submerged Sonic 5Pseudo Sonic 6Over the Hill Hero 7Robolympics 8Lovesick Sonic 9Subterranean Sonic 10Grounder the Genius 11High Stakes Sonic 12Blank-Headed Eagle 13Boogey-Mania 14Big Daddy 15The Robotnik Express 16Mama Robotnik's Birthday 17Slowwww Going 18So Long Sucker 19Robotnik's Rival 20Trail of the Missing Tails 21Momma Robotnik Returns 22Too Tall Tails 23Super Special Sonic Search & Smash Squad 24Magnificent Sonic 25Zoobotnik 26Tails in Charge 27Musta Been a Beautiful Baby 28Sonic the Matchmaker 29Attack on Pinball Fortress 30The Last Resort 31Coachnik 32Sonic Gets Thrashed 33Close Encounter of the Sonic Kind 34Tails Prevails 35Robotnik, Jr. 36The Magic Hassle 37Blackbot the Pirate 38Hedgehog of the "Hound" Table 39Robotnik's Pyramid Scheme 40Prehistoric Sonic 41Untouchable Sonic 42Sonic Breakout 43Sonically Ever After 44The Mystery of the Missing Hi-tops 45Super Robotnik 46Mass Transit Trouble 47Spaceman Sonic 48MacHopper 49Baby-Sitter Jitters 50Full Tilt Tails 51Lifestyles of the Sick and Twisted 52Road Hog 53The Mobius 5000 54Honey, I Shrunk the Hedgehog 55Sonic's Song 56Sno Problem 57Sonic Is Running 58Mad Mike, Da Bear Warrior 59Robotnikland 60The Little Merhog 61Robo-Ninjas 62Fast and Easy 63Tails' Tale 64The Robots' Robot 65Hero of the Year