I just finished DX. It was fun, but that Metallizer guy is seriously messed up for created the Lost and Found Office. It took me hours to get through that place. If I had placed this game first it might have put me off of playing the real DX version.
ZS XD is a parody, so yeah it's messed up, A LOT :D
The current version of the Lost and Found Office is very simplified, the first versions where a lot more complicated :D
And in this dungeon, there is a moment where you can obtain some things before others, and then, you can skip a part of the dungeon. I don't know if you have done all or not.