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During the development of the Pokémon games, there were many Pokémon species that were planned but never released.

See also: Altered Pokémon

Generation I

See Bulbapedia article for more information on some of these

This article is outdated
RG Charizard front.png
Feel free to update it.

Reason given: Red and Green Beta Assets were leaked which included the backsprites of some cut Pokémon.

Capsule Monsters sketches

  • Oviparous creature
  • Godzillante
  • Gorillaimo
  • Dragon4

Unknown date

  • Buhi
  • Papyō
  • Kabīn


  • Kasanagi (evolution of Kokana, the original Weedle)
  • Kasanagi's evolution
  • Gorochu (planned evolution of Raichu)
  • Index No. 134
  • Index No. 135
  • Kotora (Index No. 159)
  • Raitora (Index No. 160)
  • Deer
  • Crocky
  • Cactus
  • Jaggu
  • Unknown elephant
  • Gyaōn
  • Barunda (possibly the round shaped potential 'balloon' Pokémon. The name is taken from the Pokémon votes in the Satoshi Tajiri: The Man Who Created Pokémon manga)

Generation II

Nintendo Space World 1997 demo

The Nintendo Space World 1997 demos of Pokémon Gold and Silver allowed for the player to explore a very limited portion of Johto, with one of three randomly chosen starters, two of which were never released in the final game.

The two unreleased starters included Honooguma and Kurusu, while Chikorita (known as Happa in the demo) also appeared.

A few other Pokémon could be found in the wild, but these were usually only Pokémon that appeared (or were altered versions of those found) in the final game. Furthermore, none of the Pokémon obtained by the player could evolve even though evolved forms of the three starter Pokémon (including an unused second-stage for Chikorita known as Hanamogura) exist in the code.

In 2018, a few Nintendo Space World 1997 demo builds (including both regular and debug builds) were leaked on the Internet. With respect for copyright, please do not post Pokémon/information from the alleged leak here (except for those that could be found normally in the demo without glitches or hacking), except the information that was intended to be known.

Generation III

  • Shellos (included later in Generation IV)
  • Gastrodon (included later in Generation IV)

MicroGroup Game Review magazine

  • Unnamed Hitmontop like creature
  • Unnamed turtle

Unknown generation

  • Unnamed sheep (revealed in a magazine interview, based on a cloned sheep but not included for being 'too controversial')
  • Unnamed rabbit (Nintendo Life interview)


Data in final versions

Remnants of unused Pokémon have been found in the Pokémon games.

Generation I


The Missingno. occupy 39 index numbers in between the index numbers of valid Pokémon.

It is believed that the existence of the Missingno. (although having unintended glitch characteristics) may suggest Game Freak did (or intended to) work with additional Pokémon in Generation I, because Shigeki Morimoto is said to have confirmed (according to a Smogon thread by Zog) that 190 Pokémon were originally planned for Pokémon (with the rest being added later), and the value 151+39 equals 190.

Supporting this theory is the fact that nine Missingno. have special cries.

0x43's cry sounds identical to Zubat. 0x51's cry is comparable to Pidgey and Ditto.

Though speculation, 0x43 has been compared to Togepi, and 0xB5 has been compared to Crobat.

0x5E, 0x5F and 0x89's cries are comparable to the Dratini evolution line (note that there is an unused Pokémon design for a Pokémon that looks like Dragonair).

The cry data can be found in the table below, and can be listened to on the Pokémon Red and Blue TCRF article.

Index Number Hexadecimal Identifier Base Cry Cry Pitch Cry Length
67 0x43 0 128 16
69 0x45 29 224 128
79 0x4F 34 255 64
81 0x51 14 224 96
94 0x5E 15 64 192
95 0x5F 15 32 192
127 0x7F 17 32 16
137 0x89 15 64 128
181 0xB5 29 0 128

Generation III


Unused cries for two Pokémon were discovered in Generation III. These can be played as cries 266 and 269 in a leaked development version of German Pokémon Ruby known as "Debugging Version 0509A".

It is unknown whether these cries were intended to belong to Shellos and Gastrodon.

(In the May 2007 edition of the now defunct magazine Nintendo Power, Junichi Masuda commented that the development team were unable to put Shellos and Gastrodon in Pokémon Ruby and Sapphire but they were able to put them in Pokémon Diamond and Pearl.)

Generation IV

This section is incomplete, please feel free to add any missing information about the subject. It is missing: {{{1}}}.

Hidden within the code of Diamond and Pearl is an unused backsprite presumably belonging to Gastrodon, along with one for Shellos.

The Shellos backsprite is pink like West Sea Shellos, but has the 'wings' belonging to East Sea Shellos.

The unused Gastrodon backsprite looks like the final Gastrodon except it is missing the yellow stripes and 'flaps' on its head. Instead, its head has five bumps on it.

Additionally, the unused 'Gastrodon' backsprite has a different protrusion pattern on its back. There are three visible bumps on its sprite instead of the final backsprite two, and the three bumps have surfaces which are 'flattened out', unlike the final version which has rounder bumps.

Along with the backsprites for Shellos and Gastrodon, there are a multitude of other sprites, belonging to Treecko, Torchic, Mudkip, Ralts, Kirlia, Gardevoir, Turtwig, Chimchar, Piplup, and Manaphy.