Sonic the Hedgehog 3

After Sonic defeats Dr. Robotnik at the end of Sonic the Hedgehog 2, his space station, the Death Egg, crash-lands on a mystical floating landmass called Angel Island (or simply "the Floating Island" as it's called in the game manual). As Dr. Robotnik begins to repair the damaged station, he meets up with Knuckles the Echidna, the last surviving member of an ancient civilization of Echidnas that once inhabited the island. He is also the guardian of the Master Emerald, which grants the island its...