Persona 5 Royal - Demon Compendium SMT Mod
https://gamebanana.com/mods/451088
This is a mod that is made by ZArkadia for Persona 5 Royal. It contains most, if not all SMT demons that are in Dx2.
This is a mod that gives the player access to all 463 slots (About 29 are unusable due to Party members' Persona slot are used and story related). I have already imported over 150 demons from many Shin Megami Tensei games including Soul Hackers 2, Persona 5 strikers, Persona 3, and Persona 4. Some guest characters from Berserk, Sonic, Exo heroes, Devil May Cry, Dislyte, and Paladins also make appearance here.
There are 463 persona slots in original vanilla but only 197 is used. This makes the rest slot blank or empty. This video does not showcase the existing persona in vanilla. They all follow faithful affinity from their respective games (with some extra tweak from my own). With this, Persona 5 Royal becomes the biggest compendium compared to all Shin Megami Tensei games.
Persona 5 Royal - Demon Compendium SMT Mod