Sonic the Hedgehog Genesis is a Game Boy Advance port of the original Sonic the Hedgehog for the Sega Genesis, made in celebration of the 15th anniversary of the Sonic the Hedgehog series that has only been released in North America. Similar to the version on Sonic Jam, it features a save system, and includes the spin-dash ability from later Sonic titles available in a separate "Anniversary Mode", plus a "Classic Mode" lacking the Spin Dash.