Catching Ghosts - Luigi's Mansion

“Let’s a-go!” Luigi sinabi as he and Yoshi made their way toward the door plainly waiting at the end of the hallway.
The green plumber, not wasting a segundo to spare, opened—well, madami like yanked—the door open, and they both rushed to whatever was waiting at the other side.
To their surprise, what waited for them at the other side was a totally different scenery—so different that it made them wonder if they were still inside Bowser’s Castle.
“Are…are we still in Bowser’s Castle…?” Luigi wondered. Their surroundings were so unlike the hot and deathlike interior of the...

“What just happened to Yoshi’s Island?” Luigi sputtered.
Yoshi was just as flabbergasted as the green plumber. “I—I have no idea.”
“We should see where—” Luigi turned around for the door, only to see that it was now gone.
“The…the door! It’s gone!” Luigi screeched.
“What!” Yoshi screeched in reply.
“But that’s impossible,” Luigi panted. “I mean, we had just a-gone through a door, and it led us here, and now we look behind and it’s gone!”
“What could it mean…?” Yoshi shook his head, confused with what was going on and exasperated with all the confusion...

Luigi pondered deeper onto the tiny riddle Bowser had left them with.
“Two heads, five tiles off and three corners out,” he muttered to himself repeatedly, eyeing the two statues, the door from which they’d first entered back and forth.
“Um, Luigi…?” Yoshi noticed the green plumber from the corner of his eye. “What are you muttering about…?”
“There’s something about those two statues, and the door that we came in earlier—something’s off…,” he mumbled, not really talking to Yoshi at all.
The green dinosaur frowned. “ ‘Something’s off’? I don’t get it—what...