List of Sources

Every crossover game has it's content from some sort of other material, and Smash Bros Lawl Double Deluxe is no exception. As the origin of some of these characters may not be obvious at first, a list of where everything comes from would be appropriate. Note that the presence of some of these is greater than others.

Are U Super Cereal
Sean is one of the contestants of Empty Slot 1

BLEACH
Ichigo's long time rival Renji makes his appearance as a Playable Fighter and shares the stage with Ichigo (Super Smash Flash 2) Hueco Mundo, and Engetsuzan (Ichigo's sword) makes appears as an item

Batman
Batman's arch enemy since the very beginning, The Joker makes laughing appearance as a fighter, Gotham City is the main home stage for The Joker, and the Batarang is an item for the game

Black Butler
Sebastian Michealis is serving his appearance as a fighter and Blackstone Manor is a stage

Camren Springer
Guy crowbars his way in Double Deluxe and Bloxy is his echo fighter

Dragon Ball Z
Nail from the Namek Saga and the same race as Piccolo is a contestant of Empty Slot 1

Dragon Ball Z Abridged
Abridged Krillin comes back to Lawl without further notice, and he shares a homestage with Bardock and King Vegeta

Dragon Ball Z: Father of Goku
Bardock returns to Lawl Double Deluxe, and Planet Vegeta is his homestage, plus King Vegeta is Bardock's echo fighter

Discord
Matthew and Shadow Matthew both join the Lawl Double Deluxe server, and Discord is there homestage

Dr. Amigo Family Clinic
Dr. Amigo checks up the fight, and his Clinic is the Doc's homestage

Guardians of the Galaxy
Rocket Raccoon shoots his way in the Empty Slot 1

Gravity Falls
Rumble punches his way in Empty Slot 1

Infinity Train
Tulip finds her next stop in Empty Slot 1

Inuyasha
Inyusha slashes his way in Empty Slot 1