Sonic & Knuckles - Sega Mega Drive - Unboxed - Cart Only (missing flap) works

About this deal

Sonic and Knuckles is a 1994 platform game developed by Sega Technical Institute and published by Sega for the Mega Drive. It serves as the direct continuation to Sonic the Hedgehog 3 and features two playable characters -- Sonic the Hedgehog and Knuckles the Echidna -- each with their own story. Sonic can run faster and jump higher, while Knuckles has the ability to glide through the air, climb walls, and break through certain barriers to access areas Sonic cannot reach. The cartridge features a pass-through adapter slot that allows players to connect a Sonic the Hedgehog 3 cartridge on top, creating the combined game Sonic 3 and Knuckles. Inserting Sonic the Hedgehog 2 into the slot makes Knuckles playable throughout that game's zones. This makes the cartridge especially appealing to collectors and fans who want to experience the full lock-on functionality. The cartridge is sold here unboxed and without the original case flap, but has been confirmed as working.