"THE END." Is the final boss of sonic frontiers and is an evil ancient being that want's to destroy everything but was killed by super sonic cyber. During the ancient times a race called the ancients created 4 titans to defeat the end and failed but once sonic frontiers happened the end deceived sonic to destroy all the titans so it couldn't have any trouble but once sonic found out he teamed up with eggman and his daughter sage as well as being trained by the ancient's leader and got 2 new forms. By the way the end takes the form of what the person seeing it is most scared of so everyone sees the end differently so if you have what your persona fears in its description it will take that form.