Game:

Pokémon Red and Blue (1996)

Duration: 8:33

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TheZZAZZGlitch recently discovered the way Super Glitch works. He found that since the names of Super Glitch moves can depend on the game's memory and normally don't have a 50h terminator, when the game copies the name of the move from $CD6D to elsewhere (i.e. $D0E1 if you activate Super Glitch by viewing stats/learning a move/opening the fight menu) it copies more than the first 20 bytes of move name data intended, and 360 bytes data copied from $CD81 to $CEE8 is screen data! The game will continue corrupting values until it finds a 50h.

This means that one can manipulate the effects of Super Glitch by getting the game to update the copy of the screen by opening the Pokémon menu, opening the item menum opening the Pokedex menu, opening the trainer card screen, opening the Save menu, opening the Options menu, accessing the PC or watching the title screen.

The length of the names (including a hidden $4E added to every move) before Super Glitch will offset where the memory corruption begins.

With this glitch, TheZZAZZGlitch found a Glitch City with an F9h/249 (3) tile in the right position so that the game writes F9h to $D12C, the 'box-set' address.

For more information about how Super Glitch works, see this thread:
http://forums.glitchcity.info/index.php/topic,6627.0.html

What is the box-set address?:
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This is a memory address found by TheZZAZZGlitch that manages what options appear on the screen (like Yes/No, Heal/Cancel) when the player selects Save.

These include the unused options North/West, North/East and South/East. Box-sets greater than 07h are invalid 'glitch' box-sets. These have invalid text data, width and height data, 'one space lower' data and 'second value default' data.

The effects of glitch box-sets vary. A lot of them change lot of bytes to 7Fh, won't let you exit with B and freeze the game. Others that don't freeze the game tend to corrupt the map (e.g. 21h), but others like 1Ah and 1Bh, although they give a glitch set of options, apparently do nothing.

TheZZAZZGlitch and I found that box-sets 66h, 79h, E6h, F9h are particularly glitchy and can be used in a way without freezing the game. They have very large heights which cause memory corruption because the boxes go off the screen. While they normally trap the player and freeze the game after opening the Pokémon menu and closing it, they can be used in combination with the menu from the Trainer-Fly glitch to mess up a battle, causing the wild Pokémon to be hooked and make the 'Gym Leader' battle music play, but otherwise allow the player to walk around again after the battle ends. After the battle ends, the palette will change and Bicycle music will start to play. The player will also find that their party Pokémon are corrupted. The player now has 127 (7Fh) Pokémon, allowing more precise memory corruption via items when the first Pokémon is swapped with the tenth. If the player walks off a ledge, they will be able to walk through walls, and the effect is kept when the player flies away.

Requirements
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1) A Pokémon with a specific move-set. Its first two moves must have 11 characters (technically 13 characters with 4Es included), and its third move must be Super Glitch. The Pokémon I used in this video was a Level 24 LM4 that knew Counter, Wrap and Super Glitch
2) A Pokémon with Teleport
3) Preferably a Pokémon with Fly
4) Money to enter the Safari Zone
5) Access to Route 13
6) Preferably the Soul Badge to Fly
7) An available long-range Trainer and a free Trainer.

Steps
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1) Prepare your Super Glitcher, a Pokémon with Fly and a Pokémon with Teleport
2) Fly away from a long-range Trainer to another location with a free Trainer.
3) Battle that Trainer to get your start menu back.
4) Fly to Fuschia City and enter the Safari Zone
5) Exit, say 'no', save and reset the game.
6) Exit the Safari Zone and say 'no' to activate the Glitch City glitch.
7) Go to Route 13 (east of Fuschia City) and keep walking around until the 500 steps run out.
8) You'll be warped back to the Safari Zone gate, exit to enter the Route 13 Glitch City.
9) Press the start menu and open the Pokémon menu (important), then switch your Super Glitch Pokémon to the first position and Teleport away (important you use this instead of Fly as Flying will update the screen data). Walk back to where you flew away from the Trainer-Fly glitch Trainer and the menu should pop up.
10) Press 'Save' and the F9h box-set will appear. Press 'No'.
11) Exit the m

Thanks TheZZAZZGlitch for finding the right Glitch City.

This glitch works because Route 13's Glitch City has an F9h character ('3') on the 43rd screen character. With this equation, (0xD0E1 [relative starting address] + 0x0D [move lengths] + 0x14 [initial buffer size] + 0x2A [screen data before the '3'], an F9h character should be placed on $D12C after activating Super Glitch, provided the glitcher knows the right moves.

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