Sonic, Tails, and Knuckles aim to stop a scheme that would turn their sky realm into an underworld, plunging into the planet's core and the ruined Robotropolis city to confront Dr. Robotnik, unsure if he's ally or foe.
Directed byKazunori Ikegami, Gary Lipkowitz
Written byNaoto Ohshima, Hirokazu Yasuhara, Yuji Naka
CountryJapan
Runtime60 min
On screen
Martin Burke
Mika Kanai
Chafûrin