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Missing Number

Red and Blue

In Pokémon Red, Blue, and Yellow, each monster species has data associated with it, for a total of 190 species. 151 of these are normal Pokémon, like Nidoking or Seel. The other 39 are essentially blank data—placeholders for Pokémon should the developers wish to add more.

In the English versions of the game, these 39 are all named “MISSINGNO.”, an abbreviation for “Missing Number.” This is a translation of the Japanese phrase 欠番 (けつばん). The phrase refers to a Japanese superstition that certain numbers are unlucky due to their association with death.

Missing Number is not a real Pokémon, but more of an “empty” entry in the list of monsters. Most of these entries have no sprite (only displaying garbage on encounter), but three of these placeholders were used by the game designers to display the sprites of the fossils in Pewter Museum and the ghosts in Lavender Pokémon Tower.

The Missing Number used to display the Ghost sprite is named “MISSINGNO.” in the English versions, but in the Japanese games he has an internal name of “ゴースト”—literally, the english word “ghost.” This name is not the one used for ghosts in the final game, which is instead “ゆうれい” (the native Japanese word for “ghost” or “spirit”). ゴースト does appear in the final game as the name of the ghost type.

Most of these entries have a “blank” cry (where the base, pitch, and length modifiers have been set to zero); this sounds similar to a Nidoran cry because the zeroth base cry is used by Nidoran. Some Missingno. entries have different cries, however.

When forcibly traded to Gold and Silver, each of these is transformed into a regular G/S/C Pokémon. The Johto equivalent of each Missing Number was taken from the end of the Pokédex in order—with the sole exception of Ho‐oh, who was placed between the Missing Numbers representing Heracross and Sneasel. It is doubtful that there is significance to which Missing Number represents each G/S/C Pokémon; the choices appear to not have been made during Red and Green’s development.

Every Missing Number has a Pokédex number of #000, along with a filler Pokédex entry that contains the following information:

This Pokédex entry plays the “blank” cry when “Cry” is selected, but plays Rhydon’s cry when the entry is viewed. The contents of the Pokédex entry remain untranslated in non‐Japanese releases.

List of Missing Number entries
IdentifierName (English/Japanese)SpriteBase CryCry PitchCry LengthG/S/C Equivalent
31MISSINGNO./けつばん000Scizor
32MISSINGNO./けつばん000Shuckle
50MISSINGNO./けつばん000Heracross
52MISSINGNO./けつばん000Ho‐oh
56MISSINGNO./けつばん000Sneasel
61MISSINGNO./けつばん000Teddiursa
62MISSINGNO./けつばん000Ursaring
63MISSINGNO./けつばん000Slugma
67MISSINGNO./けつばん012816Magcargo
68MISSINGNO./けつばん000Swinub
69MISSINGNO./けつばん2922464Piloswine
79MISSINGNO./けつばん3425564Corsola
80MISSINGNO./けつばん000Remoraid
81MISSINGNO./けつばん1422496Octillery
86MISSINGNO./けつばん000Delibird
87MISSINGNO./けつばん000Mantine
94MISSINGNO./けつばん1564192Skarmory
95MISSINGNO./けつばん1532192Houndour
115MISSINGNO./けつばん000Houndoom
121MISSINGNO./けつばん000Kingdra
122MISSINGNO./けつばん000Phanpy
127MISSINGNO./けつばん173216Donphan
134MISSINGNO./けつばん000Porygon2
135MISSINGNO./けつばん000Stantler
137MISSINGNO./けつばん1564128Smeargle
140MISSINGNO./けつばん000Tyrogue
146MISSINGNO./けつばん000Hitmontop
156MISSINGNO./けつばん000Smoochum
159MISSINGNO./けつばん000Elekid
160MISSINGNO./けつばん000Magby
161MISSINGNO./けつばん000Miltank
162MISSINGNO./けつばん000Blissey
172MISSINGNO./けつばん000Raikou
174MISSINGNO./けつばん000Entei
175MISSINGNO./けつばん000Suicune
181MISSINGNO./けつばん290128Larvitar
182MISSINGNO./けつばんKabutops fossil000Pupitar
183MISSINGNO./けつばんAerodactyl fossil000Tyranitar
184MISSINGNO./ゴーストGhost000Lugia

In Diamond and Pearl

In Pokémon Diamond and Pearl are files named “ketsuban.” These are overworld sprites that spell out the phrase in Japanese. Their significance is unknown.

欠番

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