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Move 0x00 corruption (Generation I): Difference between revisions

Move 0x00 corruption (Generation I) (view source)

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{{MiscMajor R/Bglitches}}
{{Summary page}}
{{Outdated|Mention how the glitch actually works.}}
{{Bulbapedia2|-- (move)}}
"'''Cooltrainer move'''" is a nickname for the nameless glitch move with [[HEX]] 00 in Pokémon Red, Blue and Yellow, well-known for being learnable by Ditto without a [[cheating device]]. It behaves very similarly to the [[Super Glitch]] moves, taking random names and having similar effects, though some effects seem to have variations when done with this move rather than a true Super Glitch. It's name comes from its type, Cooltrainer♀.
{{PRAMA|cooltrainer-trick}}
==Is a standard move for...==
[[File:CoolTrainer6.png|frame|right|Viewing '-' on the Fight screen.]]
* A (Level 0)
* Pkmn (Level 0)
* 4h (Level 0)
* Pkmn Pkmn T (Level 0)
 
''For the glitch move in {{RB}}, please see [[AttackDex/RB:000]].''
==Is an advanced move for...==
''None''
=How to get Ditto to learn it=
==Requirements==
* A Ditto at the front of the player's party.
* A PP restoring item (Ether/Max Ether/Elixer/Max Elixer).
* A PP Up.
==Procedure==
#Battle a wild Pokémon that the Ditto can defeat. The wild Pokémon must know more than one move.
#Use Transform on the Pokémon.
#When it's the player's turn again, press SELECT on the bottom of Ditto's move list and switch the move with the top move on the list.
#Defeat the Pokémon or run away.
 
''For the glitch move in {{Y}}, please see [[AttackDex/Y:000]].''
[[Image:Cooltrainer1.png]] [[Image:Cooltrainer2.png]]
 
'''Move 0x00 corruption''', also known as '''CoolTrainer♀ glitch''' refers to the corruptions in {{RBY}} caused by a [[buffer overflow]] in the random internal names of glitch move "-" (which are of variable length).
==How it works==
When the third move is switched with the first move, they are still switched after the battle ends.
So, assume this was a Ditto's move list:
 
The applications of this were documented and popularised by TheZZAZZGlitch (along with the discovery of how [[Super Glitch (Generation I)|Super Glitch]] works). Move 0x00 corruption has also become a notable exploit in the history of various Pokémon glitched speedruns, such as 'catch 'em all'.
90 00 00 00 (Transform (none) (none) (none))
 
==Nature==
When you switch the moves, it becomes this:
[[File:CoolTrainer foe tiles.png|frame|right|Screen tiles affecting Pokémon, DV/EV, level yields by Dabomstew.]]
 
An effect similar to [[Super Glitch]] may be triggered with '-' when it is the first move by opening the fight menu or trying to move the cursor. After the effect occurs, the type of '-' may change from CoolTrainer♀ to another type.
00 00 90 00 ((none) (none) Transform (none))
 
Unlike other unterminated name/Super Glitch moves, only one buffer overflow occurs with '-' (at memory address $CF4B, but not $D0E1). No corruption is caused by the '-' move when viewing it from a status screen.
But, of course, when [[HEX]] 00 is the first move in the list, it becomes the Cooltrainer move and makes all moves below invisible.
So the Ditto's moves are really:
 
Triggering the move 0x00 corruption with '-' requires more luck than other Super Glitch moves, so the player may need to keep 'moving' the cursor or opening and closing the fight menu. After a certain point in the player's game, CoolTrainer♀ induced corruption may stop working, due to hex:50 characters appearing in its internal name too early. There is no known guaranteed way to fix this other than to use a different cartridge.
00 00 90 00 (Cooltrainer (none) Transform (none))
 
The most basic effect that can be triggered with the CoolTrainer♀ move is the [[TMTRAINER effect]], by opening the 'PkMn' menu from within battle before viewing it in the 'Fight' menu. Triggering the TMTRAINER effect in [[bp:Diglett's Cave|Diglett's Cave]] will let you avoid a freeze immediately after the battle ends. Opening the start menu after the TMTRAINER effect happens and the battle ends may be required to avoid a freeze after exiting the cave.
and will appear as (none) (none) (none) (none).
 
With the TMTRAINER effect, the enemy Pokémon's species will change into a level 127 Missingno. (hex:32) if sprites are not flipped, and a level 127 Horsea is obtainable by catching the enemy Pokémon if the sprites are flipped. Though the Pokémon's sprite will not change to the new Pokémon until it is captured, its palette may change to that of the new Pokémon.
However, Transform can be selected, and when it is used on a Pokémon with three or more moves, they can be switched back again.
 
In the Japanese versions (at least Red/Green), the equivalent Pokémon are Level 127 Missingno. (hex:38) and Level 127 Pikachu.
 
==Advanced Red/Blue usage==
In Pokémon Red and Blue, [https://forums.glitchcity.info/index.php?topic=6992.0.html more Pokémon] can be obtained with '-' (and also Super Glitch) by viewing the Pokémon menu in specific places where there is a [[0x50 sub-tile]] (often the 'bottom-left corner of a bush' tile) between y coordinates 09-0C (these are BGB coordinates; y starts as 00 at the top of the screen and increases the further down you go) before entering Diglett's Cave and triggering move 0x00 corruption with '-'. Additionally the sub-tile at BGB coordinates '''y=06, x=01''' must be equal to the desired Pokémon.
 
For an image showing where the bush tiles should be, and further information, please see [https://www.youtube.com/watch?v=Sst_5kAX2y4 this Youtube video by TheZZAZZGlitch].
 
Keep in mind that the start menu is added to the saved screen data, and the west most tiles of the start menu are between x=0A-13, so the 50 tiles replaced with start menu tiles don't count.
 
==Advanced Yellow usage==
Despite the fact that 0x00 move corruption no longer works by directly bringing over tiles from outside of battle in this version, it is still possible to get the aforementioned Level 127 MissingNo. or Horsea by flashing the items menu in battle.
 
Additionally, using the [[ItemDex/RGBY:009|Pokédex glitch item]] and closing it will print tiles on the screen in battle (but not in the same pattern as outside of battle), which can be used to potentially access CoolTrainers by flashing the items menu from within battle.
 
Additionally, the glitches [[LOL glitch]] and [[Rival LOL glitch]] which make use of [[unterminated name glitch item]]s are alternative glitches to 0x00 move corruption and can be used together to obtain many Pokémon and/or glitch Pokémon.
 
==Effect of using the move==
This effect ignores move 0x00 corruption:
 
In Pokémon Red and Blue and Yellow, '-' acts as a damaging move with Fissure's animation that may freeze the game if it doesn't defeat the opponent.
 
In {{RB}}, the effect of the move (move effect 0x74) [[arbitrary code execution|executes arbitrary code]] at F928 (Echo RAM for D928). For more information on how to exploit this, see [https://forums.glitchcity.info/index.php?topic=7504.0 here].
 
==Note==
A Pokémon with '-' as the first move can be traded to {{GSC}}, where it will become [[- (Generation II move)]], because a Pokémon is not deemed [["Abnormal" Pokémon|'abnormal']] by its moves.
 
==See also==
*[[Japanese unterminated name glitch item instant encounter glitch]]
*[[Super Glitch (Generation I)]]
*[[LOL glitch]]
 
==Names seen for Cooltrainer==
The Cooltrainer move has many different names that can be seen in different situations. Though in the move list it's name is simply "-", in battle and when using a PP Up on it, more names can be seen.
===Names in battle===
These are the names for the Cooltrainer move that have been seen in battle and their effects:
====MEW====
The animation for the move Fissure plays, and the game [[game freeze|freezes]].
====Blank====
There have been various effects for this name.
* The animation for Fissure plays.
* Music changes to that of a trainer challenge and the [[screwed-up sounds effect]] begins.
* The [[TMTRAINER]] effect begins.
* A generic strike animation plays.
* A generic strike animation plays and the [[TMTRAINER]] effect begins.
* The animation for the move Fissure plays, and the game [[game freeze|freezes]].
====The name of [[RB:000]]====
No actual effects have been recorded for this move name, as all times as it has been seen the attack has missed.
====SING====
No actual effects have been recorded for this move name, as all times as it has been seen the attack has missed.
====Glitchy character before the name of opponent====
No actual effects have been recorded for this move name, as all times as it has been seen the attack has missed.
====KANGASKHAN====
The animation for the move Fissure plays, and the game [[game freeze|freezes]].
====ROCK SLIDE====
The animation for Fissure plays, and the [[screwed-up sounds effect]] begins.
====LPCTM====
No actual effects have been recorded for this move name, as all times as it has been seen the attack has missed. However, an observation has been that after the games says "DITTO used LPCTM!", there is no pause between the time it says that and the time it started to say "DITTO's attack missed!".
====THRASH====
The animation for Fissure plays, and the [[screwed-up sounds effect]] begins.
====y====
No actual effects have been recorded for this move name, as all times as it has been seen the attack has missed.
====SC (opponent's name)====
The [[TMTRAINER]] effect begins.
===Names while using PP Up===
These names do not only include the Cooltrainer move, but of the other blank moves following it. The Cooltrainer move is referred to here as "Slot 1".
====Raising PP====
=====Slots 1, 3, 4=====
* Blank
* y
=====Slot 2=====
Always TRANSFORM.
====Maxed out PP====
=====Slot 1=====
* ALL(next Pokémon in team's name)
* Blank
[[Category:Generation I glitches]]
[[Category:Glitch moves]]
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