This happens ONLY in the collab. There is, however, a cognitive version of Paulownia Mall you can visit outside of the collab

You get run ins with P5X original characters from the very first character you unlock (Makoto). There's no overarching story like with social links - they're just treated as regular hanging out.

It's kinda like a cognitive pocket...? From what I can tell. It doesn't seem like it's in the main metaverse imo, but it's still cognitive. More often than not, you're transported to a cognitive version of somewhere in Wonder's world. lab

Incorrect! It's more cognitive shenanigans. From what I understand of the machine translation, Wonder sometimes finds an object in his pocket while in Tartarus. He'll note something mentally and the item will flash and transport him the the select P3 party member to a cognitive space.

It's funny because just as quickly as it was added, it was removed in a patch
But there's still stuff in the game referencing assets that don't exist

Be sad, because he was the last male phantom idol ever released (so far)
The next male isn't until 4.0 with the latest party member
BWS is starving us 💔. I'm not counting already existing male characters like the og PT and P3 cast

If you have him and haven't beaten then boss, i recommend Messa. Along with Sepia and a sustain (whoever you have)