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Moving on, we find a guy called 'Kreiss', imprisoned. He tells us something we could't possibly have known, and also that this massive place is some kind of fucked up illusion. He then asks to be released.
I'm not sure what happens if you refuse, but if you do he gives you the TM for Rock Climb before fleeing.
After that, you have to solve a puzzle ripped straight out of Reborn. Maids will say shit about each other, and from based on whether what they're saying matches up with each other you have to decide if their evil/liars or good/honest. Then it's a Sootopolis gym-like puzzle where you have to step on all floor tiles once before the path opens up.