Help in the storage room

[Commando Peach]

I destroyed the debris using the explosives, ventured forth and I opened a door with a big mean monster in the room. I hid myself in the room right next to it, but now the monstrer patrols the area between those two rooms. I have no idea how to proceed further without being monster lunch. Any tips?

Stealth. I can't remember the exact path I took, but just creep around in the shadows, don't move too quickly, and when you're close enough to the door, just book it! There's no trick to it. Just be sneaky.