Apocalypse is basically a version of Knucles who was involved in a realm merge, casuing Knuckles to be immortal but with a side effect: having his super form to be A Tall, Lanky, and Monstrous version of Himself. He is nicknamed End of Days due to his immense power he possess and is not afraid to use it against someone. His friend is Sekwi/B'Hemah and has mixed feelings for him. He is basically some sort of a guardian of Jehovah's realm and the outside of the realm. He hates Villians