SAVE WARNING - Once inside Glitch City, DO NOT save your game. If you save your game within Glitch City, the save file will become corrupted and you will not be able to load it properly, forcing you to abandon your playthrough and start a new game. As utilizing this glitch involves Flying to Cinnibar Island, an area only explored during the latter half of the game, it means you'll probably have played for numerous hours that you don't want to lose, so use caution with this glitch.
Follow these steps for the only known way to access Glitch City, a 'city' comprised entirely of 'glitched' pixels:
1. Enter the Safari Zone in Fuschia City. Pay $500 to play the Safari Game. Once inside, exit. The clerk will ask if you're "Leaving alreadY?". Answer "No". You'll automatically re-enter. Once inside, save your game and turn off your system.
2. Turn your system back on and load up your save. Exit the Safari Zone. The clerk won't say anything. Walk to exit. The clerk won't say anything. As you pass the clerk, he will start with the "Welcome to the Safari Zone" speech, despite the fact that you have already paid and entered. When asked if you will be participating, select "No", and exit the building.
3. Once outside, Fly to Cinnibar Island. Head east and Surf. Keep Surfing along the Sea Route until the PA message "Your Safari Game is over!" strangely pops up. You'll suddenly exit into the Safari Game building again. Take the exit that leads into Fuschia City. However, instead of exiting into Fuschia, you'll exit into Glitch City. Enjoy!
NOTE - The Safari Game glitch can be performed virtually anywhere. However, if you're anywhere other than the Sea Route east of Cinnibar when the PA message pops up, you'll just exit out of the nearest building afterwards.
There's a glitch which you can use that enables you to revisit the S. S. Anne. In order for you to actually be able to get to the S. S. Anne, however, you'll need Surf and the Soul Badge, so that you can use it outside of battle.
Okay, head down to Vermillion Harbour. The Sailer hanging around at the bottom will do what he usually does and stop you from going down into the harbour because there's no ship there. Walk up so you're directly in from of (or, technically, above) him, and face right. Save your game and turn the power off, and then start it up and select 'Continue'. Because the game is programmed so that you's automatically facing downwards when you select 'Continue', you'll end up facing down, but ON TOP of the sailor, rather than facing him. Face to the right towards the water, press A and choose to Surf on it. You can just Surf downwards and get off below the sailor. You can now enter Vermillion Harbour. Because the game is programmed so that when you have manual control over your character, the S. S. Anne is supposed to be there, it will still actually be there even though it shouldn't.
For something even weirder, when you're in Vermillion Harbour, Surf over to the right (I think, if not, just try the left) and keep going. You'll eventually reach a small area of land where a mysterious red truck is parked. There's absolutely nothing to do here and it has no impact on the game whatsoever. It's just a remnant something that was part of the original plot but removed from the final version of the game. Strange, huh?
Okay, so you may have deposited your Bike in your PC or never even bothered to get one, and you really can't be bothered to pick it up so you can get on Cycling Road.
There's a simple solution. When you enter either of the guardhouses that separate Cycling Road from Celadon/Fuschia City, walk so that you that the counter is right next to you. When the guard stops you and says that you need a Bicycle, keep on pressing Left on the D-Pad and after he's finished speaking you will walk past him anyway.
In the Game Corner in Celadon City, you can obtain 230 free Game Coins without even playing the slot machines. If you walk around inside the Game Corner pressing A, you will occasionally find some Coins on the floor. In total, you can find 180 Coins. In addition, you can gain an extra 50 free Coins from people around the Game Corner playing the slots machines. One of the guys to the far left will give you 10 Coings, and the two guys to the far right will give you 20 Coins each. You now have more than enough Coins to purchase an Abra without even having to play the slots machines or buy the Coins beforehand from the guy behind the counter.
You'll need the Coin Case to even be able to pick up