Watch Sonic the Hedgehog 2 (2022) HD Full Movie Free on SolarMovie. Watch Sonic the Hedgehog 2 (2022) online free. When the manic Dr. Robotnik returns to Earth with a new ally, Knuckles the Echidna, Sonic and his ne...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.