Cast
Simba: Sonic the Hedgehog (His young self is his original Sonic game appearance)
Extras with Sonic: Miles "Tails" Prower, Knuckles the Echidna, Shadow the Hedgehog, E-123 Omega, Silver the Hedgehog, and Max the Wolf (Sonic the Hedgehog franchise; Their young selves are their original Sonic game appearances, both real and OC)
Nala: Amy Rose (Sonic the Hedgehog franchise; Her young self is her original Sonic game appearance)
Extras with Amy: Cosmo the Seedrian, Tikal, Rouge the Bat, Blaze the Cat, Cream the Rabbit, Cheese the Chao, and Kayla the Wolf (Sonic the Hedgehog franchise; Their young selves are their original Sonic game appearance, OC-wise)
Mufasa: Cloud Strife (Final Fantasy VII; As a hedgehog)
Sarabi: Aerith Gainsborough (Final Fantasy VII; As a hedgehog)
Extra with Cloud and Aerith: Maria Robotnik (Sonic X; As a hedgehog)
Scar: Mephiles the Dark (Sonic the Hedgehog '06)
Rafiki: Sticks the Badger (Sonic Boom)
Timon and Pumbaa: Espio the Chameleon, Charmy Bee, Vector the Crocodile, Big the Cat, and Froggy (Sonic the Hedgehog franchise)
Zazu: Cait Sith (Final Fantasy VII; He won't be locked in a rib cage and will join the climactic battle upon Sonic's Group's return like in the remake)
Banzai, Shenzi, and Ed: Lock, Shock, and Barrel (The Nightmare Before Christmas; As hyenas)
Lions: Good Mobians
Hyenas: Stays the same
Wildebeest: Stays the same
Chapters
Chapter 1: Opening/The Birth of Sonic
Chapter 2: Cloud Berates Mephiles/Cloud and Maria Shows Sonic's Group the Kingdom
Chapter 3: Mephiles' "Advice"/I Just Can't Wait to be King
Chapter 4: Lock, Shock, and Barrel's Ambush/Bonding Under the Stars
Chapter 5: Mephiles' Evil Plan/Be Prepared
Chapter 6: Wildebeest Stampede/Cloud and Maria Dead and Sonic's Group Runs Away
Chapter 7: Meeting Team Chaotix, Big, and Froggy/Hakuna Matata
Chapter 8: The Mobius Lands in Ruins/Sticks Discovers That Sonic's Group is Alive
Chapter 9: Sonic's Group Reunited with Amy's Group/Can You Feel the Love Tonight
Chapter 10: Sonic and Amy's Groups' Argument/Sticks Guides Sonic's Group to Cloud and Maria's Spirits
Chapter 11: Return to Mobius Rock/Final Battle
Chapter 12: Sonic the Hedgehog King/Ending
For gallery: The Hedgehog King Gallery
For sequel: The Hedgehog King 2: Sonic's Clan
For third and final sequel: The Hedgehog King 3: Mobian Spirit