"Alright bro, they're all asleep, so now we can duplicate this universe so they all can remember everyone and everything, and then erase their memory so they have no idea who each other are," Said Crazy Hand.
"So we'll be living in two different universes?" Asked Master Hand.
"Yep!"
"Why exactly are we gonna erase their memory?"
"Because pastelCow thought about different ideas while writing The Super Smash World after she pretty much already had everything all together on The Super Smash World, and if she put all those ideas in The Super Smash World, it wouldn't add up to what was currently going on with the characters wnd the story."
"Who the hell is pastelCow?"
"I'm the only one who knows about her?"
"I guess so."
"Oh, well I hope everyone has fun at school tomorrow."
The hands did their magic, leaving the smashers with no memory of each other (don't worry though, they still know stuff).