Sonic the Hedgehog 2 (2006 Sonic Cafe), Sonic Wiki Zone

Sonic the Hedgehog 2 (ソニック・ザ・ヘッジホッグ２, Sonikku za Hejjihoggu 2?) is a mobile phone game that was released as part of the Sonic Cafe service offered by Sega. The gameplay is almost identical to that of the original version for the Sega Mega Drive. However, there are a few additional features, such as an ability to resume the game from the last level played, submitting high scores to a national league table, and an "Attack Mode" where the game's bosses are played against in sequential order. There

Sonic the Hedgehog 2 (Game) - Giant Bomb

The Murder of Sonic the Hedgehog on Steam

idw sonic – CrystalMaiden77

Sonic the Hedgehog/History and appearances (1991 - 2006)

Super Sonic (lost build of cancelled Sega CD port of Sega Genesis platformer Sonic the Hedgehog 2; existence unconfirmed; 1992-1993) - The Lost Media Wiki

Birdo - Super Mario Wiki, the Mario encyclopedia

The Forgotten, the Maligned: Sonic the Hedgehog (2006) – Source Gaming

Discuss Everything About Sonic Wiki Zone

Space Channel 5 - Wikiwand

SONIC THE HEDGEHOG (2006) - Sonic the Hedgehog - Gallery - Sonic SCANF

The Murder of Sonic the Hedgehog on Steam