For one, how we get here. For another, how power sources and technology from every world represented here exist.

[He's sounding extremely intrigued]

I mean, think about it? Your Pokemon, the Force, sorcery, magic, even the Malnosso's Shifting technology. This place is a wellspring of technology, power, and knowledge. Where else could such a place with all these things so readily available exist but in some sort of nexus?