Game Gear
Sonic The Hedgehog 2 (World) Sonic The Hedgehog 2 (World) Sonic The Hedgehog 2 (U) [!] Sonic the Hedgehog 2 (1992)(Sega)
Languages Size CRC32 Region Serial
English, Japanese 512K 95A18EC7 USA, Europe, Japan G-3321 (JPN), G-3338 (JPN, MEISAKU COLLECTION), 2507
by Ramdemann
Standard 
00D2C5:3F
by Ramdemann
Game Genie 
008-98B-3BA