Dark and a strange man teleported in to the beach trying to kill each other

"Give up you'll never kill me."

"I did it once ill do it again."

"It was a fluke."

"It wont be this time." Dark tried to stab him as the person grabbed him by the neck as red star black star and white star arrived but he knocked the three out with one blast

"Don't interfere."

"Crap." Dark passed out due to the lack of air as the person let him go and erased all four of their memories except they are family The person ran off as all four of them teleported to their home