Oh yes - Sonic 4: The Genesis Android Port by Jaxter

SONIC 4 IS GOOD NOW!? (Sonic 4 Genesis Android Port)

Sonic 4 The Genesis - Android Port

Sonic 4: The Genesis Android Port Update Release Trailer

Sonic 4 Genesis Android Port - Trailer Fangame

Game Jolt - Share your creations

Sonic the Hedgehog 4 by ChaosDrako on DeviantArt

Is it possible to port the Sega Genesis Sonic titles to the SNES in cartridges with additional hardware chips to help with the speedy nature of those games? - Quora

DS

Yes! Alpha released! - Sonic 4: The Genesis Android Port by Jaxter

sonic 4 the genesis/fan game android