1. Once in the 10^th Dimension, go near the lift to Rockslide Rumble. Then, walk to the right. If you look down, you can see a support arm below. Try to get in front of the blue plasma fence without falling. When you're directly above the support arm, freefall onto the highest spot of the arm. Try not to go too far, or you'll lose a life.

2. Carefully follow ahead without falling off of the arm. Then, jump (or fall) to the girder below it. It takes you to the opposite direction. When you're at the lowest point of the girder, freefall down and forward, to land on the highest point of the floor. Do this, and you're there!

3. Down there, you can see that the lift was removed, and that's why you can't get down the normal way.

4. And probably the most intriguing part, Wumpa fruit. This is actually a left-over, since there was going to be a boat in Twinsanity Island that would lead here. The boat was later removed, so this area was never worked on much, asides from textures.

5. Collision detection is sometimes faulty down here. Crash floats above the narrow rock passageway and he can walk on some portions of the water.

Glitch: Take Cortex everywhere- found by crashnconker

NOTE: Never EVER do this in your save slot of choice. Always use a different save slot rather than your favourite one. If you don't want to complete the game again, you can load a completed save slot and then immediately save into an empty or un-needed slot. Disabling Auto-Save would be wise too, for it can cause the game to crash.

Go to Farmer Ernest's barn in N. Sanity Island. Watch the cutscene and grab Cortex. Throw Cortex near Ernest and he'll start shooting at him for a rather big amount of time. This is your chance to go down the mount, into the beach. Cortex will follow you afterwards. Now you can grab him and drag him wherever you want.

Things to do:

- If you're using a common save slot (and not your slot of choice), you can save at the World Crate located to the right of Farmer Ernest's barn (in the grass, near the exit of Cavern Catastrophe). This particular World Crate is glitch-free and it's the best spot to save your game if you want.
- Always have Auto-Save disabled after the previous task has been done. Keep in mind that you'll have to disable it each time you load up your game.
- If you have trouble taking Cortex somewhere, just throw him, and get to where you want. Cortex will follow you. If not, just throw Cortex and move Crash alone into the next Checkpoint. Lose a life and you'll re-spawn at the Checkpoint with Cortex on-hand.
- Explore freely, finding ways to pass the levels with Cortex, except the ones mentioned below in the next list ("Things not to do"). This glitch offers the game a new challenge, which is to try and reach the end of a level with Cortex.
- To take Cortex to High Seas Hi-Jinks, you'll need to go through the alternate cave that leads there. Then, go around the big stone on the left and -very important- do not let the camera capture the right side, where the Cortex hole is. However, be warned that it's hard to beat the level this way, especially during the Rusty Walrus chase scene. If you do, however, manage to beat the chase scene, you'll have to face N. Brio and N. Tropy with Cortex on-hand, which is impossible. The best thing to do is to throw Cortex away before the TNTs explode.
- To drag Cortex around in Twinsanity Island, you don't actually need to bring him all the way from Farmer Ernest's barn. The following doesn't always work, but it's possible at random: enter Bandicoot Pursuit by its end (you have to take the portal inside the Iceberg Lab, which is located on the second floor). Carefully disable all of the traps and jump wisely, switching from Crash's path to Cortex's when needed. Cortex will be standing there at the end of that part (beginning would be more accurate). If things go well, you can grab him and carry him around. If the game decides to be annoying, this won't work. It's pretty random. 

Things NOT to do:

- Don't use your favourite save slot while doing this.
- Don't enable auto-save (since it can cause the game to crash if loaded at other World Crates. Only the World Crate mentioned above should be used, for it is glitch-free). Remember that you'll need to disable auto-save each time you load the game.
- Don't take Cortex into the Academy of Evil or the 10^th Dimension. The game completely locks before you enter the Academy of Evil, and Cortex turns invisible in the 10^th Dimension. Even if you can safely get him to Rockslide Rumble, the game will lock. The portal to Twinsanity Island doesn't work either, so it's impossible to bring him there and get out of the lab.

Follow these, and you should be fine.

Drag Cortex in Academy of Evil- found by Crashnconker
NOTE: Don't do this in your save slot of choice.
Head inside Classroom Chaos and keep going through Crash's part of the level. When you're near the part where Cortex comes out, stop. Look at the open door behind you. Double Jump and Belly-Flop on top of it. Then jump and soon you'll be on top of the ceiling. Then carefully slide-jump on the left side (avoid watching the movie when Cortex pops in at all costs). You must fall down in the next room. Hit the Checkpoint and look at the door near the Ammo Crate. Double Jump and Belly-Flop so you can be on top of it, and then jump once more. You'll be on top of the ceiling again. Afterwards, fall down to the room where Cortex should have appeared. He'll be standing right next to the door- spin him and you'll lose a life. When you respawn, Cortex will be with you.

You can also just play the level without bringing Cortex, but it's hard to do so. To activate switches and ring bells, Belly-Flop on them, or smash them with Cortex's head.

If you enter Rooftop Rampage, you'll have to beat the whole level without dying, or this will make Nina and Cortex join, causing the game to crash. When you're playing as Nina, don't spin Cortex, or the camera will freeze and make Crash and Cortex join together.

How to fix the Evil Crash glitch (PAL version):
- by HPZr, CBFan and Crashnconker
As the PAL players may have noticed, Evil Crash is supposed to chase Cortex in Bandicoot Pursuit, but he runs around in circles instead. Using this method will detour the glitch. It's somewhat complicated, but at least you can play the level properly and see Evil Crash chasing Cortex. So here's how to do it:

1) Enter Bandicoot Pursuit by its end. You'll have to enter the portal in the Iceberg Lab, which is on the upper floor. After being warped to near Cortex and Nina (right before Ant Agony), go backwards to enter Bandicoot Pursuit.

2) Accurately disable the traps and take the path backwards (or if you're good with jumping, just take Cortex's path and double jump around the hazards. Switch between paths when necessary).

3) When you reach the entrance near the Checkpoint, Evil Crash will begin chasing Cortex normally, at last. If you want the full level like this, guide Cortex to the end again, then go to the second part and repeat the process there. After that, go to the first part, touch the checkpoint, and lose a life. The level will proceed as it always should had, regardless of if you lose any lives during the chase.

Note: This won't "fix" the glitch permanently. It may be unnecessarily complicated and somewhat useless, but it's certainly nicer to see a proper chase scene instead of Evil Crash "chasing his own tail".