How does the RNG work in Pokemon Mystery Dungeon blue/red rescue team and why can quick saving mess with it?

Question

I am curious on how the rng and rng manipulation works in pmd rescue team. Also how to predict where teleport will take you.

Comments

Quicksaving the game sets the "Dungeon RNG" (The RNG seed used for generating floor layouts) to a fixed value of 1. This means that if you Quicksave at the stairs of a dungeon and then continue, you will get the exact same set of floor layouts each time.
As long as you take the same path each time, all luck-based events will be exactly the same.
Source: https://www.youtube.com/watch?v=fudOO713qYo
I'm going to leave this as a comment for now as I don't know how to predict where teleport will take you though. I will post a full answer later after doing more research on that.