Killer Instinct/Eyedol

The final boss, Eyedol, is a two-headed, ancient mystical warlord who was trapped in a dimensional prison in the distant past. Ultratech released him to be the final combatant in the tournament. It is shown in Killer Instinct 2 that the person Eyedol was trapped in combat with was Gargos, the final boss of that game. Eyedol is the only character that does not have an icon in the character select screen, however in both the arcade and Super Nintendo versions, he is a secret character that can be played by selecting a specific character (Riptor in earlier arcade versions and Cinder in later arcade versions and in the Super NES version) and pressing a combination of buttons before a round begins. He is also the only character in the game with no special finishing moves, such as No Mercy moves, ultra combos, or humiliations that the other characters possess. However, he more than compensates for this lack of ability with a limited ability to heal as the Player, and a much greater ability to heal itself as the CPU opponent.