Walkthrough:The Legend of Zelda: Twilight Princess/Diachronos/The Forest Temple

Summary
Thrall enters the Forest Temple and finds that a bunch of monkeys have been captured, and that their boss is acting really weird. After being gnawed on by countless plants, he rescues the monkeys and smacks some sense into their boss. He also finds a magic boomerang, which he uses to blow up a giant weed.

First monkey
There's a couple Keese in this hallway to kill. At the far end of the hall, you find yourself in a huge room. Ahead of you is a cage with a monkey in it. Kill the Deku Babas that attack you, then deal with the Bokoblin, and finally use a Spin Attack on the cage. The monkey climbs up the vines behind the cage and motions for you to follow her. Shoot the Walltulas, climb up, and go through the door at the end of the room.
 * There's some vines to your right; at the top is a chest with a yellow Rupee. If you want the chest, hit the Walltulas with your Slingshot and climb up the vines.

Second monkey
Run up the stairs in front of you and you encounter a Skulltula. Skulltulas are pretty nasty, but they also have a softer side... which is where you wanna stick your sword (aren't we nice?). Wait until it rears up to attack, then Spin Attack to knock it down and finish it with the Ending Blow.

Don't light the torches just yet. Instead, drop down from the platform on the north side (opposite side from the stairs) and look to the right for a big round bug. Hold the L-button and wait for it to attack you; it'll bounce off your shield and... start glowing and sparking? Pick it up and throw it at the round rock by the wooden floor. It explodes (what do you expect, it's a BOMB Bug), revealing a chest with a red Rupee! Have we found one of those yet? I can't remember... Well, it's worth 20 Rupees, so it's the biggest kind we've found so far.

Circle back around to the stairs and go back up to the platform where you killed the Skulltula. Light the torches to make a staircase rise (this is the "wooden floor" next to the chest; you can't reach the chest if these stairs are up). Follow the monkey up the stairs, but don't go through the door just yet. Instead, look to the right for a chest. Oh, we get an opening animation for this one! Must be something important! And it is: it's the Dungeon Map! Yay!

Go through the door. Let's see... big canyon, rickety wooden bridge, really windy... I don't like the looks of this. The monkey runs across the bridge and a bigger monkey appears on the other side of the bridge. The bigger monkey throws a boomerang and cuts the ropes holding the bridge up! Little monkey, NO! Okay, she grabbed the bridge, she's fine now. The big monkey catches the boomerang and.... Okay, he's dead. Nobody smacks their butt at Thrall and lives to tell about it. But the bridge is out, so we need to find another way across...

Head back to the last room and follow the monkey to a hanging rope. She jumps up and grabs the rope; jump to the monkey and swing across to the other side. Go through the door and look to the right to find another Bomb Bug. Smack it with your sword, and let it blow up the rocks, inside are some... is that pot moving? Smash the pots, and a weird chicken pops out of one! It's got a weird head, and it's talking to us... Maybe Thrall should cut mushrooms out of his diet. Go the other way and burn the web. Kill the Deku Baba here if you need Slingshot ammo, then hop across the wooden platforms. Ignore the monkey for now and go through the first door.
 * The chicken thing is actually Ooccoo, a member of a race called the "Oocca". She automatically joins you (Thrall doesn't look too happy about it), and she can warp us out of the Dungeon if we want. If you need Lantern Oil or something, use Ooccoo (yes, she's an Item), then use her son Ooccoo Jr. to get back in (if you think Ooccoo looks weird, wait till you see her son...).

It might not be obvious, but this is the room where that baboon wrecked the bridge. Cross the rotating platform ahead of you, then go through the door on the far side. Open the chest to your left in the next room for... a Small Key! There's nothing more we can do here at the moment, so backtrack to where you left the monkey. We need to jump to the ledge on the left, but a Pygmy Skulltula's in the way. Shoot it with the Slingshot to knock it down, and it walks right into the water. Yay for suicidal enemies! Jump to the ledge, then head for the locked door.
 * If you want to open another chest, cross the rope bridge to the right, then jump off the left side of this platform. In the water, look to the right to find a small tunnel; swim through to find a chest with a yellow Rupee. Swim back to the entrance to the room and climb out of the water, then head back to the locked door.

In this room is... another caged monkey!