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This article lists the development leftovers and unused content of the Japanese and English Generation I games Pokémon Red and Green, Pokémon Blue, and Pokémon Red and Blue that have been documented by fans.

Professor Oak battle

Main article: Professor Oak

At the beginning of the player's adventure, Professor Oak introduces Red to the world of Pokémon using a sprite that is similar to the battle sprites of other characters. In addition to this, he also has three full teams of Pokémon programmed in, each consisting of a level 66 Tauros, level 67 Exeggutor, level 68 Arcanine, level 70 Gyarados, and the final evolutionary stage of one of the starter Pokémon at level 69. His Pokémon are of an even higher level than those of Blue as Champion, suggesting that he was at one point intended to be faced late in the game.

If the starter used is Venusaur:

Prof. Oak Glitch Red, Green, Blue, and Yellow Reward: $6930

Type: Normal Unknown Tauros Lv.66 Take Down Normal   --       Leer Normal   --       Rage Normal   --       Tail Whip Normal   --       Types: Grass Psychic Exeggutor Lv.67 Stomp Normal   --       Barrage Normal   --       Hypnosis Psychic   --       Struggle Normal   --       Type: Fire Unknown Arcanine Lv.68 Take Down Normal   --       Ember Fire   --       Roar Normal   --       Leer Normal   --       Types: Grass Poison Venusaur Lv.69 Razor Leaf Grass   --       Growth Normal   --       Sleep Powder Grass   --       SolarBeam Grass   --       Types: Water Flying Gyarados Lv.70 Hydro Pump Water   --       Dragon Rage Dragon   --       Leer Normal   --       Hyper Beam Normal   --

If the starter used is Charizard:

Prof. Oak Glitch Red, Green, Blue, and Yellow Reward: $6930

Type: Normal Unknown Tauros Lv.66 Take Down Normal   --       Leer Normal   --       Rage Normal   --       Tail Whip Normal   --       Types: Grass Psychic Exeggutor Lv.67 Stomp Normal   --       Barrage Normal   --       Hypnosis Psychic   --       Struggle Normal   --       Type: Fire Unknown Arcanine Lv.68 Take Down Normal   --       Ember Fire   --       Roar Normal   --       Leer Normal   --       Types: Fire Flying Charizard Lv.69 Rage Normal   --       Slash Normal   --       Flamethrower Fire   --       Fire Spin Fire   --       Types: Water Flying Gyarados Lv.70 Hydro Pump Water   --       Dragon Rage Dragon   --       Leer Normal   --       Hyper Beam Normal   --

If the starter used is Blastoise:

Prof. Oak Glitch Red, Green, Blue, and Yellow Reward: $6930

Type: Normal Unknown Tauros Lv.66 Take Down Normal   --       Leer Normal   --       Rage Normal   --       Tail Whip Normal   --       Types: Grass Psychic Exeggutor Lv.67 Stomp Normal   --       Barrage Normal   --       Hypnosis Psychic   --       Struggle Normal   --       Type: Fire Unknown Arcanine Lv.68 Take Down Normal   --       Ember Fire   --       Roar Normal   --       Leer Normal   --       Type: Water Unknown Blastoise Lv.69 Bite Normal   --       Withdraw Water   --       Skull Bash Normal   --       Hydro Pump Water   --       Types: Water Flying Gyarados Lv.70 Hydro Pump Water   --       Dragon Rage Dragon   --       Leer Normal   --       Hyper Beam Normal   --

This battle is present in all Generation I games and can be triggered in different ways.

• By performing the Ditto glitch using a Pokémon with a Special stat of 226 if the wild Ditto's Attack is lowered by 4, 5, or 6 stages (each number of stages will yield a different one of the three teams).
• By performing the Old man glitch with a player's name containing the ^M_N character in the third, fifth or seventh slots, Professor Oak can be battled as a glitch Trainer; however, he will not have a defined roster.
• By performing a specific select button glitch in the Japanese Pokémon Red, Green, and Blue.

There are no preset dialogues for Professor Oak to be used either before the battle or after defeating him.

In the Japanese versions, Professor Oak is referred to as オーキドせんせい Ōkido-sensei during the battle instead of the usual オーキドはかせ Ōkido-hakase.

Bird type

Main article: List of glitch types

The Bird type may have been a prototype for the Flying type. This can be seen in the final releases: Missingno. is recognized as a dual-type Bird/Normal Pokémon. The Bird type is present in the internal data of the Generation II games, possibly due to their engine being an upgraded version of that of the Generation I games.

Directions

Unused text strings within the game show option dialogs for North/West (Japanese: きた/にし North/West), North/East (Japanese: きた/ひがし North/East), and South/East (Japanese: みなみ/ひがし South/East). These do not appear in the final release, with the only in-game option dialogs being Yes/No (Japanese: はい/いいえ Yes/No) and Heal/Cancel (Japanese: あずける/やめる Heal/Cancel).^[1][2] (For unknown reasons, there is no unused South/West (Japanese: みなみ/にし South/West) option dialog.)

Unused Trainer class

Main article: Glitch Trainer

A Trainer class known as Chief (Japanese: シルフのチーフ Silph's Chief) was omitted from the final releases, though like Professor Oak, a battle with an NPC with this data can be accessed through modification of the internal data or saved game data as well by cheating. It is apparently mentioned in-game by one of the Team Rocket Grunts in Celadon City, and shares its battle sprite with the Scientist Trainer class since its index number of 0xE3 precedes it (Scientist's is 0xE4). He has no defined roster, instead using the one for the first Scientist on the internal list. Also like Professor Oak, he has no preset dialogues programmed in either for before the battle or after defeating him.^[2]

Its Japanese name suggests that the President of Silph Co. was originally planned as a Trainer that could be challenged to battle.

Extra field move

An extra field move might have been planned as there is an unused entry between Fly and Surf within the internal data. It could also have been an HM as it is placed between the aforementioned HM02 and HM03 and all HMs are ordered by number in the internal data. Given its index number of 0xB4 and that the highest index number used for actual moves is 0xA5, other moves beyond the 165 introduced in Generation I were once planned as well.^[2]

The unused text string "Ground rose up somewhere!" (Japanese: どこかでじめんがもりあがった！) might be related to this scrapped field move.^[3]

Music

An unused track has been discovered in the internal data. The music is originally high-pitched and incomplete as only the individual audio channels are left. There have also been attempts at recreating what the full theme would sound like.

Original music

Recreation attempt

Locations

Main article: List of locations by index number (Generation I)

There are three map locations which are each identical to another map used in the final releases, except for the fact that the default theme used in the alternative location is different.^[4]

• The house invaded by Team Rocket in Cerulean City: has index number 0x45 instead of 0x3E and plays Caves of Mt. Moon
• The Underground Path's entrance at Route 6: has index number 0x4B instead of 0x4A and plays Vermilion City Theme
• The Poké Mart at Cinnabar Island: has index number 0xAD instead of 0xAC and plays Cinnabar Island Theme

In addition, 25 deleted map locations with leftover header data are present in the internal list of location index numbers.

• Three use the Victory Road map header (index numbers 0x69-0x6B)
• 17 use the Pokémon League map header (index numbers 0x6D-0x70, 0x71-0x75 and 0xED-0xF4)
• One uses the Pokémon Tower map header (index number 0x94).
• Three use the Rocket Hideout map header (index numbers 0xCC-0xCE).
• Another uses the Rock Tunnel map header (index number 0xE7).

Formatted data exists for an additional map location.^[5] It is located straight after the final town in memory (Saffron City) but just before Route 1. Its associated data is completely blank, even its header data and coordinates on the Town Map (as it is set as being part of Pallet Town, with coordinates (0,0)), except for the fact that an unused flag when checked allows the player to Fly to it. Attempting to travel to this location simply freezes the games.

There is an unused warp tile in Celadon City.^[6] It is internally programmed in to lead to 5F of Celadon Dept. Store, which in turn has its internal data located away from the data for the other floors, possibly suggesting that it was originally a completely different map in earlier stages of development, which is supported by the aforementioned discovery.

A part of the internal data relates to a Poké Mart placed between the data for the Fuchsia and Cinnabar Poké Marts and may be associated with the formatted map location as mentioned above. The item list contains Great Balls, Super Potions, Hyper Potions, Full Heals and Revives.

Items

Main article: List of dummied out items

Regularly unobtainable key items with the names of all the Badges exist in the internal data (index numbers 0x15-0x1C). This could mean that the Badges were originally going to be items that were carried in the player's Bag; however, as key items, they appear to be actually used in the list of Badges presented by the Gym Badge man in Cerulean City.^[7] The BoulderBadge (index number 0x15) and CascadeBadge (index number 0x16) are the only ones that do something when used in battle—they allow the player to throw Bait and Rocks, respectively, as in the Safari Zone battles. When used in the overworld (except dungeons and caves), it changes the background music to a single channel of 道案内 Guidance; if used in a dungeon or cave, it changes the background music to a single channel of ～オープニング～ ~Opening~. This is due to the function that plays the "throw Bait or Rock" sound effect attempting to load it but referring to the wrong soundbank.

Key item ????? (index number 0x07) enables the player to Surf without using a Pokémon. Badges are not required either. Due to this ability, it is often referred to as Surfboard. In the final releases, the move Surf can be used by a Pokémon as a field move serving the same function. It may indicate that Surf was not originally implemented as a field move or that this is a debugging item used by the programmers. Unlike the move Surf, it also allows surfing on Route 17's Cycling Road and does not trigger the "Cycling is fun! Forget Surfing!" (Japanese: せっかくのサイクリング！⋯⋯なみのりはやめとこう) message.

The Pokédex is also present as an key item with index number 0x09 and can be accessed during battle, much like Ash does in the anime. It also causes the VRAM to load the overworld tileset and turns the HP bar to letters when used in battle.

Coin is programmed in as regular inventory item, having index number 0x3B. It cannot be used for slot machines or price exchanges, rendering it completely unusable. It will stack if multiple Coins are obtained; however, it is not stored by the Coin Case. It can be sold for $5 each at any Poké Mart and bought for $10 each from a Poké Mart with a modified item list. Actual Coin Case-stored Coins are available for double the price, at $20 per Coin, and cannot be sold. In the Trainer's Guide (manual) of Pokémon Red and Blue, it is listed as a "miscellaneous item"; thus, it is the only item to be included in this category.^[8]

TMs 51-55 (index numbers 0xFB-0xFF) were planned and contain each HM's respective field move by order. They stack as any other TM and can be sold at Poké Marts.^[2]

• TM51 teaches Cut like HM01; can be sold for $1500 and bought for $3000
• TM52 teaches Fly like HM02; can be sold for $7000 and bought for $14000
• TM53 teaches Surf like HM03; can be sold and/or bought for $0
• TM54 teaches Strength like HM04; can be sold for $4000 and bought for $8000
• TM55 teaches Flash like HM05; can be sold for $2000 and bought for $4000. Also appears as Cancel (Japanese: やめる Cancel) and hides items below it; this secondary effect might be due to its index number (0xFF), which puts it at the bottom of the item list in the internal data.

Another key item named ????? (index number 0x2C) and a fake PP Up (index number 0x32) exist and are completely useless. The fake PP Up can be sold for $4900 and bought for $9800, unlike the real PP Up, which is sold and/or bought for $0.

Cries

Certain Missingno. use specific leftover cries.^[9][2]

• Cries with index numbers 0x43 and 0x4F do not appear to resemble the cry of any actual Pokémon.
• Cry with index number 0x51 resembles Pidgey's cry, cries 0x5E and 0x89 resemble Dragonair's; cry 0x5F resembles Venusaur's and cry 0x7F resembles either Vaporeon's, Jolteon's or Flareon's cries.
• Cry with index number 0xB5 is modified from Zubat's but resembles Crobat's, suggesting that the Pokémon might have been originally planned for Generation I instead of Generation II.

Text

Main article: List of items by index number (Generation I)

Unused text strings referring to Badges and titles exist in the Japanese versions, but were not translated for the localizations. The katakana used for the gairaigo (loanword) of "badge" is also slightly different, being バッヂ Baddji instead of バッジ Bajji.^[2] These names appear in the internal item list of the Japanese versions on offsets 0x4A92-0x4B08, which would suggest that they are items; however, they do not have valid effects if they are forcedly used as items. The most likely scenario is that these names originally belonged to different multiple lists.

• かみなりバッヂ Lightning Badge
  • Not to be confused with the Thunder Badge, which is named オレンジバッジ Orange Badge in Japanese.
• かいがらバッヂ Shell Badge
• おじぞうバッヂ Jizo Badge
  • A possible reference to the Japanese variation of Ksitigarbha, known as Jizo.
• はやぶさバッヂ Falcon Badge
• ひんやりバッヂ Cool Badge
• なかよしバッヂ Friendship Badge
• バラバッヂ Rose Badge
• ひのたまバッヂ Fireball Badge
• ゴールドバッヂ Gold Badge
  • ゴールドバッジ Gold Badge is actually the Japanese name of the Marsh Badge.
• たまご Egg
• ひよこ Chick
• ブロンズ Bronze
• シルバー Silver
• ゴールド Gold
• プチキャプテン Little Captain
• キャプテン Captain
• プチマスタ Little Master
• マスター Master

Default player and rival names

The unused default name for Red in the English versions is Ninten while Blue's is Sony. While it is impossible to view these names during regular gameplay, changing a few memory addresses in RAM can allow for these names to appear as shown here. This references the fact that in the years surrounding the releases of the Generation I games, Sony was Nintendo's main competition. Ninten is also the default name of the main protagonist of Mother, a game developed by Creatures, Inc., which has worked on the Pokémon games since the start.

In the Japanese versions, the unused default names for Red and Blue differ between Pokémon Red and Green and Pokémon Blue^[10]:

• In Pokémon Red and Green, Red's unused default name is やまぐち Yamaguchi while Blue's is いしはら Ishihara. Yamaguchi refers to Wataru Yamaguchi, an art director that worked on the original games, while Ishihara refers to Tsunekazu Ishihara, the current president and CEO of The Pokémon Company and who was the games' producer at the time.
• In Pokémon Blue, the unused default names for Red and Blue are, respectively, ゲーフリ Gēfuri, an abbreviation of Game Freak's name in Japanese (ゲームフリーク Gēmu Furīku), and クリチャ Kuricha, a reference to Creatures, Inc.

Unused in-game trade

Main article: List of in-game trades

A Butterfree-for-Beedrill in-game trade was originally planned.^[11] The Beedrill's nickname in Pokémon Red and Green is ピピん Pipin and チクチク Chikuchiku in Pokémon Blue. This explains why the international releases contain unused text strings referring to a Beedrill nicknamed Chikuchiku.

References

This game-related article is part of Project Games, a Bulbapedia project that aims to write comprehensive articles on the Pokémon games.