To be completely fair, this one will be difficult to do and I was inspired by another story to make this one. The story I was inspired by was called "Mario & Sonic: Multiversal Collision", which was made by a Wattpad Author named MightyChance. So I highly recommend the story as it was really good. 

So to start off, I will be combining Series and things that I personally know. So I will begin with the Series and Franchises that I am most familiar with.

Sonic The Hedgehog

My Hero Academia

Highschool DxD

RWBY

Ben 10

Rising of the Shield Hero

That Time I Got Reincarnated As A Slime

Overlord

Soul Eater

Hyperdimension Neptunia

Now with the Series and Franchises out of the way, I guess it's time to get into the Vtubers portion. As most people who have been reading my stories, they would know that I am mostly a Vtuber Fanfiction type of writer. So I'll be including only Vtubers from these particular Agencies.

Hololive

Vshojo

I wanted to limit it this time as sometimes I tend to overdo it. So with the Crossovers done, I'll get into the OCs. The OCs will mostly be from the story that one of my friends made as I would recommend you check him out. Though he goes by three separate accounts. So I would advise that you check them out, which the accounts are, MonarchChaos, SSJ4_Sayu and MiracleGT.

I think I'll end up making all the Chapters and ACTs very long, so it might take a while to get each chapter out from time to time. So with all of this out of the way, I hope you enjoy!