Do you think there is more lore about the Shadow Realm we don't know about? If so, what your theories?

What if Magica created the shadow realm?

Cool theory.

I am starting to think those Tuplas aren't only creatures in the Shadow Realm in my opinion. But I might be wrong.

Lena is not the only inhabitant of the shadow kingdom, there may be others! For example, I would like there to be another character (my fantasy): Rico is the younger twin brother, who will be the complete opposite!