Sonic & Knuckles

Sonic & Knuckles is a 1994 video game, published and developed by Sega, released for the Sega Genesis. The game marked Knuckles' debut as a playable character.

Sonic's Story
After his last defeat, Dr. Eggman makes a last effort to steal the Master Emerald in order to limitlessly fuel the Death Egg. Now, Sonic the Hedgehog must retrieve the Emerald to save Angle Island.

Knuckles' Story
Sometime after Sonic's story, an EggRobo attempts to kill Knuckles the Echidna with a well placed bomb. Knuckles gets angry and a chase begins. After getting to Hidden Palace Zone, Knuckles goes to Sky Sanctuary Zone only for the EggRobo to catch him. Mecha Sonic then shows up and tries to kill Knuckles, only for the latter to glide away, causing Mecha Sonic to destroy EggRobo. The two then battle with Knuckles then winning only for Mecha Sonic to enter his super state using the Master Emerald he had stolen. Knuckles then wins a though battle only for the platform to collapse. Sonic the Hedgehog then shows up in the Tornado and saves Knuckles. Knuckles the places the Master Emerald back at Angle Island restoring it’s flying state.