Movie review of #Sonic the Hedgehog 2: "When the manic Dr #Robotnik returns to Earth with a new ally, #Knuckles the Echidna, Sonic and his new friend #Tails is all that stands in their way." Starring Ben Schwartz, Idris Elba, Colleen O'Shaughnessey and Jim Carrey, the film picks up after the first Sonic movie with the return of Robotnik.