Glitch Unown

Glitch Unown (Japanese: バグアンノーン Bug Unknown) are invalid Unown in the Pokémon games.
In Generation II, they can be found with glitches on the Unown Mode and occasionally result in side effects. If their sprite is forced in battle with an external device, these side effects may differ.
The term is also used to refer to a class of glitch Pokémon in Generation III, and glitch Pokémon with index values greater than 684 in the main-series Generation V games, although more glitch Unown most likely exist in other games.
==Causes==
Normally, the Unown Mode should display an entry for each Unown. This limits the valid values to 26, while there are 256 possible values. For this reason, there are 230 hexadecimal values in the Unown Mode where the data does not consist of a valid Unown's picture and name. Index numbers past 26 presumably represent unrelated data encoded as "Unown" data.
===Registering glitch Unown===
To register a glitch Unown in Unown Mode, the player must obtain a ????? (Hex FF) as a bad clone from the Celebi Egg glitch. If the ????? is placed as the first Pokémon in the party, the player can use the "MOVE W/O MAIL" option to withdraw 6 Pokémon.
This corrupts RAM data located past the expected end of the , although there are only a limited amount of Pokémon that the player can withdraw before the game freezes.
If details about a 'post-6' Pokémon conflicts with data about Pokémon in the Unown Mode, then it is possible to replace entries with glitch Unown, provided that the player already has the Unown Mode. For example, the index number of the current fourth move's PP of Pokémon #11 conflicts with RAM data associated with the first Unown.
It is possible to replace the first Unown with a glitch Unown this way provided that the player used PP Ups to raise its associated index number past 26.
In the process of obtaining glitch Unown, the player will be corrupting the values of other RAM addresses such as those determining seen or owned Pokémon in the Pokédex, or the number of different options on the menu.
==Glitch Unown types and forms==
===Types===
*Static: The glitch Unown takes its data from an address in the game's RAM which is not related to the player's location. As a result, the glitch Unown will have a unique sprite.
*Dynamic: The glitch Unown takes its data partially from the player's location. The glitch Unown will change its sprite depending on where the Unown Mode is displayed.
*Influenced by the Pokédex Mode: By changing the Pokédex Mode, the glitch Unown will change.
===Forms===
*Letters: The glitch Unown is composed of Unown's letters on a black background.
*Lines and/or squares: The glitch Unown is made up of black lines or of black/white squares. 
*Mixed: Means that the glitch Unown is made up of symbols and/or of scrambled Pokémon pictures.
*Unknown: Some glitch Unown can't have their description shown because they freeze the game when accessed.
==Gallery==
File:Glitch Unown letters.png|A glitch Unown made up of letters
File:Glitch Unown squares.png|A glitch Unown made up of squares
File:Glitch Unown mixed graphic.png|A glitch Unown with a sprite of a scrambled Chikorita
File:Glitch Unown block.png|A glitch Unown with a sprite similar to ゥ/ 4ァ 4, a Generation I glitch Pokémon
==Effects==
A glitch Unown can trigger several other glitches when displayed, including corruption of the Pokédex, corrupted graphics, the Trainer House glitch, corruption of the saved file, and/or the glitch dimension effect. The message "No windows available for popping" can also appear. Glitch messages, which will be placed directly in the player's mailbox (listed below), can appear as well.
===List of glitch Unown that can cause glitch messages===
This is a list of glitch Unown that change the values associated with the player's mailbox, with the exact amount of glitch messages that will be added. Missing hexadecimal values will not corrupt the player's mailbox.
{| border=1 width="100%" align="center" style="background: #FFFFFF; border:1px solid #; border-collapse:collapse;"	
Hex	Number of glitch messages
00 	205
1C 	201
1D 	201
1E 	70
23 	194
24 	193
27 	1, can be converted into a Fire Stone
29 	232
31 	62, can be used for the GS Ball mail glitch
32 	124
38 	57
39 	12
3A 	142
3C 	207
3D 	248
41 	17
43 	252
46 	20
47 	10
48 	179
49 	95
4A 	201
4B 	126
4C 	33
4E 	136
4F 	119
50 	254
52 	129
53 	206
54 	115
56 	209
58 	15
5A 	1, can be converted into a Master Ball
5C 	205
60 	80
67 	12
69 	206
6B 	107
70 	192
73 	251
74 	1, can be converted into a Silver Wing
7D 	124
83 	209
84 	222
86 	15
89 	57
8A 	63
8E 	220
91 	88
97 	251
99 	243
A1 	33
A2 	57
AA 	95
B0 	251
B2 	1, can be converted into a Master Ball
B8 	9
BC 	57
C0 	197
C1 	52
C5 	206
CF 	224
D3 	17
D6 	206
DA 	50
DC 	57
DE 	42
DF 	195
E3 	208
E5 	241
E6 	15
EC 	1, can be converted into a Master Ball
ED 	50
F1 	105
F2 	175
F9 	53
==Generation III Glitch Unown==
Modifying the sprite ID of an Unown may result in glitch Pokémon for the invalid values; namely regular Pokémon sprites with a glitched palette (also called Generation III hybrids), no sprite Unown, or game freezing Unown.
==Generation V Glitch Unown==
Some Pokémon with an index value of greater than the largest valid index number in the game (684 in B2W2) can also be referred to as "glitch Unown". These glitch Pokémon use the sprites of Unown, alongside the cry of a . Their names consist mostly of question marks (sometimes incorporating kanji and even Korean hangul in B2W2), and their match those of alternate forms of Pokémon like , , , and , as these are almost certainly the points where alternate form data is stored. It may be the case that, like Generation III, only the sprites are given these index numbers, and all information is instead pulled from the true Unown index number, leaving these other values to be filled in with either garbage data, or the data corresponding to other Pokémon forms which may be stored there instead.
==External links==
*Glitch City Laboratories wiki article
*Glitch City Laboratories wiki UnownDex for glitch Unown
==Video==
Category:Glitch Pokémon
it:Unown glitch