Screen Wraps:

If you ever manage to get to the left/right sides of the screen and there's not a load zone there you will be wrapped to the opposite side of the screen.

Wrong Warps: Thanks to the junk code that is above and below every level, assuming you get past the 3A blocks or the 55 blocks (see the "How levels work" guide), you can sometimes hit loads and other unintended blocks.

Also, in The Mines, on the screen where you climb ladders to get to Tweety, the warp that is to the left warps to a room in the mines that is not immediately previous to the current room.

Atlantis Screen Wrap(Raft Screen): The bottom left side of the raft screen in Atlantis is missing a 3A block. Assuming there is a way past the 12 block you could wrap the screen.

Daffy Screen Wrap: There is a pool you can drop into outside Daffy's Castle. It brings you to a sewer place. There are no 3A blocks on to make a left wall, so you can wrap the screen and touch hit the load zone on the far end of the screen. It saves 4.5 seconds or more on the first screen.

Atlantis Spike Clip: I have managed in real time to clip through a block with spikes on it in Atlantis. This saves exactly 0 time and I still haven't figured out what's going on.

Bubble Glitch (or more clever name?) -

Stand on a bubble and hold "X". It will push you through any ceiling you encounter. If there are spikes, you will be hit by them.

Also, if you hold down while down the glitch then let go of X and immediately let go of down you will zip sideways. The direction is determined by which was Porky's butt faces when he crouches.

A skip in The Alps -

On hard, the Ostrich in-between the two sections of three doors that make up the maze section will shoot fire balls. You can jump off the third on by waiting until the black portion under the ostrich's neck reaches the star next to the ostrich, then by jumping to in front of the ostrich will let you hit the fire ball. Bouncing off this and hitting the ostrich high in his cycle lets you bounce to the second set of three doors and you can continue the stage without entering the maze.

Daffy's Castle Wall Clip -

Go to the little side room after the first pool screen. You can jump into/onto the top left wall. Nothing happens, it is just a missing 3A block.

Boss Fights:

Every boss fight seems to be on a loop. It also seems you can not manipulate them.