Blue Hallway
It's another hallway, similar to the red hallway. This one is blue, of course, with a bunch of doors leading to some closets and a bunch of other places. Near the end of the hallway seems to be a double-door, but it's locked...and nothing but void looks to be on the other side.
Tarnish: Upon entering this hallway, Tarnish realizes...
...that MX-Z0 never actually told him where Stranger was. He's just been wandering around aimlessly, hoping to stumble upon the guy, but hasn't found anything yet.
What he has stumbled upon, however, is a bright yellow door at the end of the hall that wasn't there before.
Tarnish: Welp, nothing ventured, nothing gained, he always says!
He immediately goes to investigate the new door, throwing caution to the wind.