From Bulbapedia, the community-driven Pokémon encyclopedia.
As with most gaming software, Pokémon Red and Green, in their final release, contain several "dummied out" features that were programmed into the games but for one reason or another had their activating events taken from the final versions.
In addition, the English translations of these games, Pokémon Red and Blue, had several of their own altered aspects during the two years between the release of the Japanese Blue and the English translations.
In a gaming exhibition called Game On, early concept art of Red and Green by Ken Sugimori was featured, along with beta material from Ruby and Sapphire. The concept art depicts rough versions of various concepts that made it into the final game. They seem to include various battles, the Safari Zone, Red riding on a Lapras, a Blastoise, Celadon City, Silph Co., and a town with a fountain which could have been reworked into Celadon City. Some other Pokémon are identifiable in a raw or semi-normal form, such as Gastly and others are prototypical of an entire class of Pokémon, such as a basic Template:Type2.
Battling against Professor Oak
At the beginning of the game, Professor Oak introduces the player to the world of Pokémon using a sprite that is similar to the battle sprites of other characters. However, he also has a full team of Pokémon programmed into the game, consisting of a Tauros, Exeggutor, Arcanine, Gyarados, and the final form of the starter Pokémon that was not taken by the player or Blue.
Oak's Pokémon are of an even higher level than those of Blue as Champion, perhaps implying that he was at one point intended to be faced after the defeat of the Elite Four.
This battle can be activated through the Mew glitch with a Special stat of 226, and remains in place in Pokémon Yellow.
The Bird type may have been a prototype version of the Flying type. This can be seen in the final version of the game: Missingno. is a Bird/Normal Pokémon. The Bird type is present in the Generation II games' programming; this is unsurprising, since the game engine for Gold and Silver is based on that of the Generation I games.
It is possible to force a situation where the player has a choice of selecting options NORTH, SOUTH, EAST, and WEST as opposed to the options which appear in the final game such as Yes/No and Heal/Cancel. The words "WEST" and "SOUTH" in block capitals do not even appear in the final game.
Female player character
There were originally plans for a female character to be playable in Red and Green, as older sketches suggest. Green from Pokémon Adventures seems to be based on her. The character was redesigned and included in the remakes of the game, to continue the standard of including a female protagonist option.
No Mew present
According to the interview by Satoru Iwata with Tsunekaz Ishihara and Shigeki Morimoto about the release of Pokémon HeartGold and SoulSilver, localized as "Iwata Asks", they admitted that after the debug features were removed, they added Mew in the empty space. Nintendo thought that this would have been risky because altering the game code after completing testing, meant that any new bugs created by adding data with no debugging features would have been much harder to be fixed. Standard programming practices usually discourage altering the code and not testing it, just before releasing the game to the customer.
Unused Trainer classes
An unused Trainer class known as "Chief" was omitted from the final game, though like Oak, a battle with an NPC with this data can be accessed through cheating.
The Trainer class is mentioned in-game by one of the Team Rocket Grunts in Celadon City, and shares its battle sprite with the Scientist Trainer class.
Alternative map locations
There are three map locations which are each identical to another map used in the final game, except for the fact that the default music used in the alternative location is different.
These locations are:
Formatted data exists for an additional map location. 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 (where the game defaults the location as 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 game.
Unused shop data
Unused shop data exists and may be associated with the formatted map location as mentioned above. The "shop" lists Great Balls, Super Potions, Hyper Potions, Full Heals and Revives.
- Main article: List of dummied out items
Unused items with the names of all the badges exist in the game's coding. This could mean that the badges were originally going to be items that were carried in the player's bag. The Boulder Badge and Cascade Badge 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 outside of battle, they have another strange effect - after the throwing animation, the music changes to a loop of Professor Oak's "good Pokédex" jingle.
There is an item in the game named ?????, which enables the player to Surf without using a Pokémon. Due to this ability, it is often referred to as Surfboard. In the final game, the move Surf can be used by a Pokémon as a field move serving the same function. This has led a few players to speculate that either the move Surf was not originally implemented as a field move or that the move did not initially exist as an HM.
Some concept art shows Poké Balls on the ground, in two pieces. This is most likely just a carryover from when Pokémon was Capsule Monsters. Strangely, the original Pokémon Red and Green sprites don't show the button in the center of the Poké Ball.
This item allows use of the Pokédex inside battle, much like Ash in the Anime, however, it causes various graphical glitches to occure.
During the promotional period that preceded the English release of both the anime and games, some Pokémon were shown with different names than they had in the games at release. These names varied from being slightly off from their current names, to being closer to their Japanese names, to being totally different from any current Pokémon name.
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"The Misty" wants to fight
Before the U.S. release of Red and Blue, screenshots were released of a rival battle with the text "The BLUE wants to fight!". While this text would work with a typical Trainer, such as "The Lass" or "The Hiker", as they were not given personal names until Generation II, it would cause problems with Gym Leader, Elite Four, rival, and game link battles, leaving them to end up as "The Misty" or "The Lance", as these Trainers did not at the time have titles, only their names. Because of this, the "The" article was dropped in the final version of the game, leading to the somewhat odd sentence style used until Generation III of "[Trainer's class/name] wants to..." In the first rival battle, the text says "The ASH wants to fight!" "The ASH sent out (Starter Pokémon)!"
A screenshot in the instruction manual of Pokémon Red and Blue still contains the text "The BROCK wants to fight!", possibly suggesting a late removal. The instruction manual also mentions Pokémon Leaders instead of Gym Leaders.
"(POKéMON) CUT down a bush!"
"ODDISH CUT down a bush!" beta field message.
On page 31 of Pokémon Red and Blue's Nintendo Player's Guide a different dialog string "ODDISH CUT down a bush!" is used in a screenshot when cutting down the bush next to Vermilion City Gym. The fact that Cut can also be used to destroy areas of tall grass may have been the reason why the text was converted to "(POKéMON hacked away with CUT!)" in the final game.