Evie (ChickasaurusGL) 🌺 | PP copier glitch - Corrupting a Pokémon's nickname and making it over Level 100 (Generation I) @ChickasaurusGL | Uploaded March 2023 | Updated October 2024, 2 hours ago.
This PP copier glitch occurs when the game thinks it has to print "PP" on the party menu over four times, hence causing a buffer overflow (involving the game printing "PP" multiple times off the screen, hence corrupting unrelated portions of the memory with "PP").
It normally doesn't occur because there is nothing to set the CD6C address (wNumMovesMinusOne) to an invalid value and it is usually overwritten. However, there is an exception with a Pokémon that has move 00 ("CoolTrainer♀"-type) at the top of the moves list; the game won't overwrite CD6C.
There are a number of glitches we can use to overwrite CD6C. For this video, we use Brock Through Walls.
Using a Rival's/Jack effect glitch item like with item 0x94 https://glitchcity.wiki/ItemDex/RB:148 to walk on an impassable tile, you can talk to the Pewter Gym guide one step above him, and D322 (item 3) should read 0F 23 E7 DA (Paralyze Heal x 35, TM31 x 218).
https://glitchcity.wiki/Rival%27s_effect
You can get those items by setting up dry underflow glitch, Celadon looping map glitch (and tossing from TM31 x 0 which is x256). Furthermore, in the current PC box there should be no FF bytes for the first 5 Pokémon (make sure not to have any Pokémon with catch rates of 255). For the sixth Pokémon's PP, have it high. In this video, we use a (internal PP reading) of 254 for the third move (63 PP and three PP Ups used) for the maximum PP possible.
To get that, have a Level 7 Chansey and use this glitch to underflow Hyper Beam as the third move, place it in the box as Pokémon 6. https://glitchcity.wiki/Hyper_Beam_automatic_selection_glitch
For Pokémon 7, use a 255 catch rate Pokémon such as Rattata.
Also, you'll need a Pokémon with move 00 as the first move, which you can get from Ditto and the swapping Transform moves glitch. https://glitchcity.wiki/Swapping_Transform_moves_glitch
With all these requirements met, you can pull of the Brock Through Walls. Though the Start button is disabled, you can do PP Copier by viewing your Ditto from the PC box summary. Changing the box to itself (and saving the game) allows us to avoid a game freeze by resetting the game. Another 'bad corruption' is the Glitch City Pokémon Center, and the music sticking glitch https://glitchcity.wiki/Champion_Blue_music_sticking_glitches . You can proceed to escape it by changing item 37 quantity (wCurMapTileset) to a value where Escape Rope is allowed.
A potentially useful effect is corrupting some of our Pokémon's nicknames to have 『『 (might be "PP" in the game's other encodings) in them, in case you want a weird nickname or an unterminated name Pokémon https://glitchcity.wiki/Unterminated_name_Pok%C3%A9mon_(Generation_I) (useful for oobLG https://glitchcity.wiki/OobLG ).
For the 254 PP method, note if it extended as far as box nicknames it may have corrupted meta map scripts, so this glitch could be dangerous causing specific locations to freeze the game. Also, we corrupted our Fly destinations, allowing for instant battles (though this breaks Fly). If I remember a ZZAZZ glitch Trainer is possible but I haven't rechecked the glitch Fly destinations glitch right now.
https://glitchcity.wiki/Meta-map_script_activation https://glitchcity.wiki/ZZAZZ_glitch
Relevant code in the Pokémon Red disassembly:
github.com/pret/pokered/blob/2954013da1f10e11db4ec96f9586b7c01706ae1a/engine/pokemon/status_screen.asm
This PP copier glitch occurs when the game thinks it has to print "PP" on the party menu over four times, hence causing a buffer overflow (involving the game printing "PP" multiple times off the screen, hence corrupting unrelated portions of the memory with "PP").
It normally doesn't occur because there is nothing to set the CD6C address (wNumMovesMinusOne) to an invalid value and it is usually overwritten. However, there is an exception with a Pokémon that has move 00 ("CoolTrainer♀"-type) at the top of the moves list; the game won't overwrite CD6C.
There are a number of glitches we can use to overwrite CD6C. For this video, we use Brock Through Walls.
Using a Rival's/Jack effect glitch item like with item 0x94 https://glitchcity.wiki/ItemDex/RB:148 to walk on an impassable tile, you can talk to the Pewter Gym guide one step above him, and D322 (item 3) should read 0F 23 E7 DA (Paralyze Heal x 35, TM31 x 218).
https://glitchcity.wiki/Rival%27s_effect
You can get those items by setting up dry underflow glitch, Celadon looping map glitch (and tossing from TM31 x 0 which is x256). Furthermore, in the current PC box there should be no FF bytes for the first 5 Pokémon (make sure not to have any Pokémon with catch rates of 255). For the sixth Pokémon's PP, have it high. In this video, we use a (internal PP reading) of 254 for the third move (63 PP and three PP Ups used) for the maximum PP possible.
To get that, have a Level 7 Chansey and use this glitch to underflow Hyper Beam as the third move, place it in the box as Pokémon 6. https://glitchcity.wiki/Hyper_Beam_automatic_selection_glitch
For Pokémon 7, use a 255 catch rate Pokémon such as Rattata.
Also, you'll need a Pokémon with move 00 as the first move, which you can get from Ditto and the swapping Transform moves glitch. https://glitchcity.wiki/Swapping_Transform_moves_glitch
With all these requirements met, you can pull of the Brock Through Walls. Though the Start button is disabled, you can do PP Copier by viewing your Ditto from the PC box summary. Changing the box to itself (and saving the game) allows us to avoid a game freeze by resetting the game. Another 'bad corruption' is the Glitch City Pokémon Center, and the music sticking glitch https://glitchcity.wiki/Champion_Blue_music_sticking_glitches . You can proceed to escape it by changing item 37 quantity (wCurMapTileset) to a value where Escape Rope is allowed.
A potentially useful effect is corrupting some of our Pokémon's nicknames to have 『『 (might be "PP" in the game's other encodings) in them, in case you want a weird nickname or an unterminated name Pokémon https://glitchcity.wiki/Unterminated_name_Pok%C3%A9mon_(Generation_I) (useful for oobLG https://glitchcity.wiki/OobLG ).
For the 254 PP method, note if it extended as far as box nicknames it may have corrupted meta map scripts, so this glitch could be dangerous causing specific locations to freeze the game. Also, we corrupted our Fly destinations, allowing for instant battles (though this breaks Fly). If I remember a ZZAZZ glitch Trainer is possible but I haven't rechecked the glitch Fly destinations glitch right now.
https://glitchcity.wiki/Meta-map_script_activation https://glitchcity.wiki/ZZAZZ_glitch
Relevant code in the Pokémon Red disassembly:
github.com/pret/pokered/blob/2954013da1f10e11db4ec96f9586b7c01706ae1a/engine/pokemon/status_screen.asm
