Blue (game)

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If you were looking for the game paired with Pokémon Red Version, see Pokémon Red and Blue Versions.
If you were looking for the Japanese Blue Version, see Pokémon Blue Version (Japanese).
If you were looking for the character known as Blue in Japanese, see Green (game).

Blue Oak
グリーン Green
Lets Go Pikachu Eevee Blue.png
Artwork from Let's Go, Pikachu!, Let's Go, Eevee! by Megumi Mizutani[1]
Age 11RGBYFRLG [2]
18+B2W2 [4]
20+SMUSUM [5]
Gender Male
Eye color Brown*, Black*
Hair color Orange*, Brown*
Hometown Pallet Town
Region Kanto
Relatives Professor Oak (grandfather), Daisy (older sister), Samson (cousin-twice-removed)
Trainer class N/A*RGBY
Pokémon TrainerB2W2SMUSUMPE
Battle LegendSMUSUM
Generation I, II, III, IV, V, VII
Games Red, Blue, Yellow, Gold, Silver, Crystal, FireRed, LeafGreen, HeartGold, SoulSilver, Black 2, White 2, Sun, Moon, Ultra Sun, Ultra Moon, Let's Go, Pikachu!, Let's Go, Eevee!,
Stadium, Stadium 2, Masters EX
Leader of Viridian Gym
Badge Earth Badge
Champion of Indigo Plateau
Game animation debut File 1: Red
English voice actor Lucien Dodge (Origins)
Erik Kimerer (Generations)
Billy Kametz,[6] Henry Mason[7] (Masters EX)
Japanese voice actor Takuya Eguchi (Origins)
Jun Fukuyama (Generations)
Ryōta Ōsaka[8] (Masters EX)
Anime counterpart Gary Oak, Blue
Counterpart debut Pokémon - I Choose You!
Manga counterpart(s) Green, Blue

Blue Oak (Japanese: グリーン Green) is the rival of the player and the Champion in the Generation I games, as well as in Pokémon FireRed and LeafGreen, their Generation III remakes.

Sometime during the three years between the plotline of the Generation I games, Pokémon FireRed and LeafGreen, and the events of the Generation II games and their remakes, Pokémon HeartGold and SoulSilver, as well as during the events of Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!, Blue takes the place of Giovanni as the Viridian City Gym Leader, as Giovanni had disappeared after he disbanded Team Rocket. Blue does not specialize in a particular type of Pokémon and, like Giovanni before him, he gives anyone who defeats him an Earth Badge.

In Pokémon Sun, Moon, Ultra Sun, and Ultra Moon, he is one of the leaders of Alola's Battle Tree, the other being Red.


Blue named ブルー (Blue) in the manual of Pokémon Yellow
Red and Blue called "Ash" and "Gary" in the Nintendo Power guide

While he had various names in Generation I, from Generation II onwards he is referred to as Blue (Japanese: グリーン Green). He appears as a non-player character in several core series games, Pokémon Stadium 2, and Pokémon Masters EX. He was named after the Generation I game Pokémon Blue in English, or Pokémon Green in Japanese.

In the Japanese version, Blue and his sister Daisy are only referred to by their given names, and it is not known if they have the surname of their grandfather Professor Oak. However, in the English version, Blue's sister is named Daisy Oak, therefore he is presumably named Blue Oak as well.

In the player's story as seen in the Japanese game manuals from Generation I, the rival's name refers to a game other than the current one: グリーンR, レッドGB, or ブルーY (Green, Red or Blue). However, this was adapted as "your rival" instead in the English version. For instance:

  • In the Japanese manuals of the Generation I games:
    「となりには(おさな)なじみのグリーン(ライバル)が()んでいます」 ([...] his childhood friend Green (rival) lives next door.)R
    「となりには(おさな)なじみのレッド(ライバル)が()んでいます」 ([...] his childhood friend Red (rival) lives next door.)GB
    「となりには(おさな)なじみのブルー(ライバル)が()んでいます」 ([...] his childhood friend Blue (rival) lives next door.)Y
  • In the English manuals:
    "Your rival lives next door to you."RB
    "[...] your next door neighbor [...] even thinks of you as his rival."Y

In some game screenshots from the English manuals, the rival's name appears as RedRB or GaryY. In Pokémon Stadium, he is simply known as Rival (Japanese: ライバル Rival).

In the Pokémon: Official Nintendo Player's Guide (Nintendo Power, 1998), the rival is named Gary, sharing the name of his anime counterpart (while the player character is named Ash on this guide). This is also found in the list of default names.

He is also known by some placeholder names, which are stored in the game data but not available in normal gameplay: SonyRBY (Japanese: いしはら IshiharaRG; クリチャ KurichaBY) or Terry (Japanese: みてい Undefined)FRLG. At least in Generation I, there are some hidden game mechanics that would display this name, therefore it should become visible if some RAM addresses were changed.[9]

  • The English "Sony" references the fact that in the years surrounding the releases of the Generation I games, Sony was Nintendo's main competition, while the player's placeholder name is "Ninten" in those games.
  • The Japanese いしはら (Ishihara) refers to Tsunekazu Ishihara, the current president and CEO of The Pokémon Company and who was the games' producer at the time
  • The Japanese クリチャ (Kuricha) refers to Creatures, Inc. (Japanese: クリーチャーズ Creatures).
  • The Japanese みてい is a placeholder for no name given yet. Possible translations are "Undefined", "Pending", or "TBD".

During the development stage of Pokémon Red and Green, he was initially named ギャラ夫 (Gyarao), a reference to him being a Trainer of Gyarados.[10]

In the core series games

He is a very cocky and somewhat unfriendly young man, typically bidding people farewell with "Smell ya later!" (Japanese: バイビー! Baibii!), and his primary motivation throughout the game is to become the greatest Trainer. Aside from that main goal, he also seems to take satisfaction from always being one step ahead of the player character. He eventually accomplishes his goal, defeating the Kanto Elite Four and becoming the Pokémon Champion, but is quickly defeated by the player, losing the position.

In Pokémon Red, Green, and Blue, Pokémon Yellow, and Pokémon FireRed and LeafGreen, Blue is the player's rival. He used to be a good childhood friend of Red but became mean as they grew older. He believes that Red is his rival because they are of the same age and height. He will meet up with the player as they journey across the Kanto region, challenging them every once in a while to test their skills. Like the player, he receives a first partner Pokémon from Professor Oak, his grandfather: the one he chooses will be of the type which weakens the type of the player's choice. In Yellow, he will take the Eevee Professor Oak had intended for the player.

Eventually, Blue becomes the Champion at Indigo Plateau, though he is defeated by the player before Professor Oak arrives to congratulate him. Once Professor Oak arrives, he deems Blue to have not realized how to care for Pokémon, which he commends the player for. Frustrated, Blue journeys to the Sevii Islands at Professor Oak's request, obtaining new Pokémon to use in his matches against the player at the Indigo Plateau (as all in-game Champions return to their position on the player's return to their hometown).

In Pokémon Gold, Silver, and Crystal and Pokémon HeartGold and SoulSilver, however, it is revealed that, after he was defeated at the Indigo Plateau by Red (Leaf does not appear and is not mentioned in the remake games, and did not exist at the time of Generation II), Blue returned to Pallet Town. As Viridian Gym's Leader, Giovanni, had abandoned it on his defeat at the hands of Red, Blue took the position, now handing out the Earth Badge to Trainers who bested him. In Generation IV, he also distributes TM92 (Trick Room) to those who win the Earth Badge, but does not give a TM out in Generation II. He has not lost his nature as a traveling Trainer, however, and frequently leaves his Gym, creating problems for Trainers who wish to challenge him. When they do find him wherever he is, he points them in the direction of Viridian Gym for an official league battle. Blue will not battle the player until they have the other seven Kanto Badges in the remakes. However, in the originals he can be challenged as early as after the meeting on Cinnabar Island.

In HeartGold and SoulSilver only, the player can face Blue in a rematch at the Fighting Dojo. The method of obtaining his number is slightly different from the other Gym Leaders. The player must have their Pokémon at maximum friendship and have it massaged by Daisy Oak seven times. After the seventh time, she will give the player Blue's phone number when spoken to. He can be called for a rematch on Sunday night.

In Pokémon Black 2 and White 2, the player can challenge Blue in the Pokémon World Tournament. He participates in the Champions Tournament, with Giovanni filling in his space as a Kanto Gym Leader.

While he does not appear in X and Y, Blue is mentioned by a woman in the Magenta Plaza Pokémon Center in Lumiose City, who says that Blue traveled to the Kalos region to study abroad.

In Pokémon Sun, Moon, Ultra Sun, and Ultra Moon, Blue appears at Alola's Battle Tree, having been invited to be a leader of the facility alongside Red. When the player first enters the facility area, Red and Blue will appear to greet the player and congratulate them on becoming the Champion of Alola, after which the player gets to battle against one of them.

In Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!, Blue is first encountered in Pewter City after the player has defeated Brock. He mentions how he also left on a journey from Pallet Town sometime earlier than the player, and, as Professor Oak hadn't made a Pokédex by the time he left for his journey, had had to resort to scribbling down on a map what Pokémon he encountered and where. He's later briefly met again aboard the S.S. Anne, where he will give the player a Shalour Sable and warn them and Trace about Team Rocket. If talked to aboard the ship, Trace can reveal that Blue actually defeated the Elite Four several years ago. When Team Rocket later takes over Silph Co., Blue is met again at the first floor of the company's office building in Saffron City. He talks about going to the Pokémon League to ask the Elite Four's help in taking down Team Rocket, but wishes to battle the player and Trace first before doing so. After the player has defeated Blue, Trace battles him next while the player starts climbing the building.

After the player has earned seven Badges, Blue appears in Professor Oak's Laboratory in Pallet Town, where he congratulates the player and Trace from defeating Team Rocket at Silph Co., rewarding them with a Key Stone each and also giving the player all the Kanto first partner Pokémon Mega Stones. Once the player has defeated Giovanni at the Viridian Gym, Blue meets the player in front of it and reveals that he had been asked multiple times to take over the Gym, and now that Giovanni has left it, he decides to finally accept the request and become the new Viridian Gym Leader. Trace earns his final Badge from him soon afterwards. During the post-game, the player can rematch Blue at the Gym once per day.


Pokémon Red and Blue

For all of Blue's teams in Pokémon Red, Blue, and Green, see here
Champion battle

Blue has one Full Restore per Pokémon, using it 12.5% of the time if their HP falls below 20%.

Bulbasaur If the player chose Bulbasaur:

Charmander If the player chose Charmander:

Squirtle If the player chose Squirtle:

Pokémon Yellow

For all of Blue's teams in Pokémon Yellow, see here
Champion battle

Blue has one Full Restore per Pokémon, using it 12.5% of the time if their HP falls below 20%.

Vaporeon If Eevee evolved into Vaporeon:

Jolteon If Eevee evolved into Jolteon:

Flareon If Eevee evolved into Flareon:

Pokémon Gold, Silver, and Crystal

Blue has two Full Restores.

Pokémon FireRed and LeafGreen

For all of Blue's teams in Pokémon FireRed and LeafGreen, see here
Champion battle

Blue has four Full Restores.

Bulbasaur If the player chose Bulbasaur:

Charmander If the player chose Charmander:

Squirtle If the player chose Squirtle:


Blue has four Full Restores.

Bulbasaur If the player chose Bulbasaur:

Charmander If the player chose Charmander:

Squirtle If the player chose Squirtle:

Pokémon HeartGold and SoulSilver

Gym battle


Pokémon Black 2 and White 2

Blue uses three of these Pokémon in Single Battles, four in Double and Rotation Battles, and all six in Triple Battles.

Pokémon Sun, Moon, Ultra Sun, and Ultra Moon

First possible battle

Battle Tree

Blue uses four of these Pokémon in Double Battles and two in Multi Battles.

Double Battle (on 20th consecutive battle)

Super Double Battle (on 50th consecutive battle)

Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!

First battle



The following has been mentioned to have been caught by Blue in Generations I and III but was never seen on any of his teams.

Spr 3f 104.png

Blue also mentions he has caught 40 species of Pokémon before battling the player on the S.S. Anne.

In the side series games

Pokémon Stadium

Blue, simply referred to as "Rival", appears in Pokémon Stadium as the final opponent in the Gym Leader Castle challenge. His team alters depending on the game inserted and what his first partner Pokémon's final form is in the inserted game. The teams listed below are the default teams he uses if no game has been inserted.


For all of Blue's possible teams in Pokémon Stadium, see here
Round 1

Round 2