Part V: Beneath the Monkey Head
Luckily Elaine had previously taken the ludicrous action of writing down the location of Monkey Island, so we just sail there. One the way to the Monkey Head, Elaine calls Guybrush out on how many lives he ruined this time around. Which is brilliant...love that one of the games called this out, comedy gold. Eventually, you'll enter the Monkey Head alone.
Follow the only path for a bit. You'll have a chance to chat with Wally and Flambé along the way, but otherwise this part is uneventful. At the end of the twisting path, just jump off in the lava.
...or onto a ledge. One of the two. Enter the nearby door, and Guybrush will shout out a challenge and cause LeChuck to seal the way forward.
Only the Organized Pirate Will Pass
Pick up the stone knife laying on the ground and then head to the right into the next room to find the Squinting Monkey statue. Head to the right once more and in the next room, use the stone knife or your regular knife on the Frustrated Monkey statue. Pickup the stone crackers and the stone coin before continuing. The final room has a stone coin and a stone spyglass you should take, and also a Monkey With Parrot statue that hungers for some stone crackers or regular crackers. Giving the crackers to the statue causes Guybrush to swap out the stone mug being held by the statue. Going to the right again leads you to the entrance room. Go the the right again and use the stone spyglass or twin monocle on the Squinting Monkey statue. Go back through the rooms to take back the the knife if you didn't use the stone variant. Head downstairs.
Only the Observant Pirate Will Pass
Once more Guybrush alerts LeChuck to his presence and has the way forward blocked off. Pick up the stone coin from the ground, then head right to find the Captain Monkey Beard statue. Ignore him for now, pickup the stone coin from the floor, and go right again. Take the stone coin near the First Swab statue which should give you a total of five. If you have less, you may need to backtrack upstairs and try to find those. Head to the right again to find the Cabin Monkey statue.
Time to fill up the statue chests! Place a coin into the Cabin Monkey statue's chest, then head to the left and put two coins into the First Swab's chest. This opens up the door, so make your way back to it and head downstairs.
Only the Blood Thirsty Pirate Will Pass
Once more Guybrush is the instrument of his own inability to progress. Head to the right to see a Sad Monkey statue. Stab it with the knife, then head to the right. The Screaming Monkey statue also needs a good old fashioned stabbin'. In the final room to the right is a...broken statue?!?!?! Not to worry! Head back into one of the other two rooms and use the stone mug on the stream of ichor flowing from the stabbed statue. Pour the contents of the mug into the drain at the base of the broken statue. The door will open, so head back and descend the staircase.
Endgame
There's a fork in the path right before the stairs. Take the lower path and examine the stone slab in the lava. Read it for a fancy limerick. It will describe the pirate face you need to make on the giant wheel blocking the entrance, as well as give the date for the center.
Now head up the small staircase to the giant stone wheel. The center wheel shows a year, and the other two show faces. Set the center circle to the year mention in the poem. Match the top and bottom faces with the description you read in the slab. Once all three wheels are set, the door will open and you exit to...
...the alleyway in Mêlée?! Exit the alley and talk with Stan, who will hand you his keys. If you want, you can liberate the key from the animatronic Locke Smith and use it on the golden Secret chest to obtain the ultimate Secret of Monkey Island. Whether or not you reclaim this amazing prize, use the keys Stan gave you to shut off the lights at all of the displays. Then talk to Elaine and let her know you're ready to leave.
The final thing to do is tell Boybrush what the Secret actually was. The only thing this effects is a quick scene after the credits roll. Congrats on finishing this game!
Back to the Part IV!