Professor Oak

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Professor Samuel Oak
オーキド ユキナリ博士 Dr. Yukinari Okido
Art from Pokémon FireRed and LeafGreen
Age around 50
Gender Male
Eye color Black* Blue*
Hair color Gray* Brown*
Hometown Pallet Town
Region Kanto
Relatives BlueDaisy (games)
Gary Oak (anime, manga)
May (manga adaptation)
Trainer class former Trainer, Pokémon Professor
Generation I, II, III, IV
Games Red, Blue, Yellow, Gold, Silver, Crystal, FireRed, LeafGreen, Stadium 2, Diamond, Pearl, and Platinum
Anime debut Pokémon - I Choose You!
English voice actor Stan Hart (4Kids)
Billy Beach (TPCi)
Tara Jayne (child)
Japanese voice actor Unshō Ishizuka
Keiko Toda (child)

Professor Samuel Oak (Japanese: オーキド ユキナリ博士 Dr. Yukinari Okido, Ookido-Hakase and Orchid are also seen) is a Pokémon Professor and has a home and research lab located in Pallet Town. According to Professor Elm, Oak concentrates on Pokémon and human relationships as a profession.

In the anime

File:Prof oak.jpg
Professor Oak in the anime

In the anime, Oak is most notable for his vast research facility, where he cares for and studies hundreds of Pokémon, including those owned by, but not currently traveling with, Trainers from Pallet Town. His often-forgetful attitude and other antics are also notorious. He also has a hobby of composing haiku-like poems about Pokémon or Pokémon-related themes.

35px    Spoiler warning: Major plot or ending details may follow.
Sammy Oak

He appears as a young boy, Sam (Japanese: ユキナリ Yukinari) in the fourth film, Pokémon 4Ever. Ash Ketchum befriends Professor Oak as Sam, when he is transported by Celebi into the future. The revelation that Sammy and Oak are one in the same comes in the credits, when Tracey Sketchit is cleaning out the closet and finds Sam's sketchbook, not knowing anything about Sam. He is impressed by the Professor's skill in art. Also, Professor Oak knew Sam's name even though Ash never told him. Ironically, in that movie, young Sammy saw numerous Johto Pokémon, notably Celebi and Suicune, although in the Kanto arc, there are only 151 in the Pokédex he invented (but this may have been because Oak later realized that he needed to preserve the timeline and not reveal his knowledge of the future).

Prof. Oak lives up the road from Ash's mother and the two often appear together as they are good friends. He currently lives with Tracey Sketchit, who became his loyal assistant in The Rivalry Revival. Tracey and Prof. Oak are very passionate about studying Pokémon and are both artists. He has confidence in his grandson, but more often joins Ash's mother and friends in cheering on Ash in his competitions.

Oak is sometimes the candidate speculated to be Ash's father, along with Giovanni and Silver. However this is improbable because he is Gary's grandfather, and Ash and Gary are the same age.

In the novelizations written by Takeshi Shudō, Professor Oak comes from a prestigious family. He has two brothers, one is the mayor of Pallet Town and the other is the Post Master, and his grandfather was the first Trainer from Pallet Town to receive widespread recognition. According to Professor Elm, Professor Oak's studies and research mostly focus on how humans and Pokémon interact with each other.

He is an old friend of many other Pokémon professors, including Ivy, Elm, Birch and Rowan.


This listing is of Professor Oak's known Pokémon:

(dub only)



Voice actors

He also has these Pokémon to give to new Trainers:


Known Trainers with his starter Pokémon

(to Gary)
(to Ash: as starter)
(to Gilbert)
(to May, not as a starter)

Pokémon residing at Oak's Lab

Krabby → Kingler
164 s.png
Phanpy → Donphan
Krabby (Giant)

Pokémon previously residing at Oak's Lab

File:May's Bulbasaur.PNG

Voice actors

  • Japanese
  • English
  • Brazilian
  • Portuguese
    • Rui Luís Brás (Kanto, movies 3 and 4)
    • Rui Quintas (Johto-Battle Frontier)
    • Paulo B. (movies 1 and 2)
  • Spanish
    • Hugo Jiménez (Latin-American)
    • Roberto Encinas (Spain)
  • Polish
    • Grzegorz Pawlak (seasons 1-4; all dubbed movies)
    • Jacek Kałucki (seasons 5-6)
    • Janusz Wituch (season 10)

In the games

File:Y Oak.png File:OakSprite.png
Oak sprite from
Generation I
Oak sprite from
Generation III

In Generation I and Generation III

Professor Oak works in his Laboratory in Pallet Town with his aides. He gave Red, Blue and Leaf their first Starter Pokémon in Pokémon Green, Pokémon Red, Pokémon Blue, Pokémon Yellow, FireRed and LeafGreen. He is an idol to many Trainers and researchers, including Professor Elm, and always plays an important supporting role in the many games that he appears in.

He was a childhood friend of Agatha. They remained good friends (some speculate that they were a couple) and top-class Pokémon Trainers until Oak stopped battling and became interested in Pokémon research. Agatha said that he became soft and started to regard him as a fool. However, Oak still affiliates with the Pokémon League as an adviser.

In the Generation I games there is unused Trainer data for Prof. Oak. This implies that Oak was originally going to be able to be battled. In the data, Oak has Level 66 Tauros, Level 67 Exeggutor, Level 68 Arcanine, Level 70 Gyarados and one of the Kanto starters at Level 69. This places his strength on-par with the player's rival and the Pokémon League champion. As well, four of his Pokémon are identical to the ones used by the champion, only higher level, so originally Oak may have been intended to be in the game as the champion, or at least another high-ranking Trainer. This is supported by an email on the PC in Oak's lab, from the Pokémon League issuing a challenge to all Trainers, then specifically requesting Oak come visit them. The only known way to battle Oak is to use a special stat of 226 with the Mew glitch, or cheat.

Fame Checker

This is a list of the Fame Checker's information on Professor Oak in Pokémon FireRed and LeafGreen.

Pallet Town - sign
  • What does this person do?
"Oak Pokémon Research Lab."
Pallet Town Research Lab - Prof. Oak
  • What is this person like?
"To make a complete guide on all the Pokémon in the world...
That was my dream!"
Pallet Town Research Lab - aide
  • What is this person like?
"Prof. Oak may not look like much, but he's the authority on Pokémon.
Many Pokémon trainers hold him in high regard."
Viridian City - Pokémon Journal
  • Family and friends?
"Prof. Oak reportedly lives with his grandchildren, Daisy and Blue."
Pokémon League - Agatha
  • Family and friends?
"I hear Oak's taken a lot of interest in you, child.
That old duff was once tough and handsome.
But that was decades ago. He's a shadow of his former self."
Pallet Town Research Lab - aide
  • What does this person do?
"Prof. Oak is going to have his own radio show soon.
The program will be called Prof. Oak's Pokémon Seminar."
Message from Oak
  • From: Prof. Oak
  • To: [Player]
"Why do Pokémon compete and battle so hard for you?
They do so because they can see the love and trust you have towards Pokémon.
Never forget that."

In Generation II

Professor Oak was always well-known in Kanto but in Generation II he became more of a celebrity, a "star Pokémon Researcher", then. He started to be famous in Johto because of his Radio Show with DJ Mary. He was going to turn down the show at first but Mary's energy and persistence wore him down. Gold/Kris first met him visiting the home of Mr. Pokémon, another of Oak's childhood friends. Later he grants the young Trainer access to Mt. Silver, a place which only finest Pokémon Trainers may enter, after the player has earned all the badges in Johto and later Kanto.

Professor Oak has many old friends. One of them is Kurt, a Poké Ball smith from Azalea Town and another is Professor Elm who used to be Oak's assistant. In fact, there is an email addressed to him from Professor Elm:

Prof. Oak, how is your research
coming along? I'm still plugging
away. I heard rumors
that <name> is
getting quite a reputation.
I'm delighted to hear that.
Elm in New Bark Town 8-)"

It should be noted that this is the first time that Internet slang is used.

Professor Oak has gained many fans and admirers. One of them is Schoolboy Chad, who frequently calls the player to share trivia about Oak.

In Generation IV

Professor Oak is also a good friend of Professor Rowan. He visits Sinnoh often, has a home in Eterna City, introduces Trainers to Pal Park, and gives them the National Pokédex, as well as the Up-Grade, Poké Radar and the function Trainer Counter of the Pokétch. A letter that he sends to the player in a special event allows the player to find Shaymin. An aide in Rowan's laboratory mentions that Oak is Rowan's junior in terms of seniority.


He made a cameo in the TCG game for Game Boy on his own card.

In sidegames

Professor Oak also was one of the two human characters appearing in Pokémon Snap. He was working on a Pokémon Report for the Pokémon species of Pokémon Island, and hired Todd to take pictures for the report. He provided Todd with the ZERO-ONE and its Dash Engine upgrade, Pokémon food, Pester Balls, and a Poké Flute. When Todd took a picture of each of the Pokémon Signs, Professor Oak drew a connection between them and the constellations to determine that Mew must be on Rainbow Cloud.

In the Pokémon Special manga

Although Professor Oak's first mention was in A Glimpse of the Glow in a conversation between Red and some Pallet Town children, his debut was in Bulbasaur, Come Home!, where Red had wandered into his lab and was immediately accused of being a thief. In his haste, Red accidentally released all the Pokémon in the lab, including Bulbasaur, causing the two to track them down and re-capture them. After being saved by Red from a Machoke attack in Viridian City, Oak gave Red the Bulbasaur and a Pokédex. The professor also makes appearances in The Secret of Kangaskhan and Gyarados Splashes In!, talking about Team Rocket's experiments. Oak later appears in Volume 3 to battle Blue under the alias "Doctor O" and reveals Blue's phobia of Flying-type Pokémon and her theft of Squirtle. However, he shows compassion by giving her the last Pokédex and forfeiting his position in the Pokémon League.

In the GSC Saga, Oak is now known as the leading authority on Pokémon in both Kanto and Johto and has developed the three new Pokédexes. The first was stolen by Silver, the second and third he gave to Gold and Crystal. During the battle with the Mask of Ice, he gave out the titles to the six Pokédex holders and Yellow. At the end, he employed Crystal as his assistant and thanks to her, the Pokédex had been filled and he owned all non-legendary Pokémon for his research.

In the FRLG Saga, Oak was captured by the The Three Beasts to lure Red, Green and Blue to the Sevii Islands; but not before he recalled their three Pokédexes. After he was freed at Trainer Tower, Oak upgraded the Pokédexes to add the National Pokédex capability.

One of Professor Oak's projects was a full analysis of a report holding all information on the last awakening of Jirachi. From this, he worked out that it would appear where the Battle Frontier was being built during its opening week. He immediately contacted Scott and, while he would not move the opening, Professor Oak managed to convince Scott to allow a Pokédex holder to guard Jirachi. This was Emerald. However, someone stole the disc with all the data from Professor Oak's lab.


He has these Pokémon, or has owned them in the past:

On hand

Spearow → Fearow

Given away

Lucky-tchi (Given to Daisy)
Saur (Given to Red in Bulbasaur, Come Home!)
Charmander (Given to Green before A Glimpse of the Glow)
Blasty (Stolen by Blue)

In the laboratory


In the TCG

This listing is of cards mentioning or featuring Professor Oak or his Pokémon in the Pokémon Trading Card Game.

Name Type Rarity Set Set no.
Professor Oak T Uncommon Base Set 88/102
Base Set 2 116/130
Professor Oak's Research T Uncommon Expedition Base Set 149/165
EX FireRed & LeafGreen 98/112
EX Dragon Frontiers 88/101
Professor Oak's Visit Su Uncommon Secret Wonders 122/132
(H) Unnumbered Promotional cards (no English release)

There also exists a "dark counterpart" of Professor Oak, called Impostor Professor Oak, who has also appeared in other Pokémon media. Apart from his first incarnation, Expansions in which he has been featured also include Dark Pokémon. The following list is of cards mentioning or featuring Impostor Professor Oak or his Pokémon.

Name Type Rarity Set Set no.
Impostor Professor Oak T Rare Base Set 73/102
Base Set 2 102/130
Impostor Oak's Revenge T Uncommon Team Rocket 76/82
Impostor Professor Oak's Invention T Rare Neo Destiny 94/105

Other appearances

Super Smash Bros. Melee

Professor Oak appears as a random trophy wearing his regular clothing from the anime.

Trophy information

The leading expert on the study of Pokémon. It seems there are always new and mysterious species of Pokémon being brought to light, and Professor Oak is at the heart of it all with his insightful research. The Pokédex is one of his inventions: new Trainers receive one, and a Pokémon to boot, when they start out.


  • Professor Oak is the only Pokémon Professor to have appeared in all Generations (from Generation I through Generation IV), appearing in Generation I and Generation III as the regional professor and making occasional appearances in Generation II and Generation IV.
  • Professor Oak is the only Professor that has been shown to catch a Pokémon in the games, catching Pikachu for the protagonist of Pokémon Yellow.
  • Professor Oak is the only in-game professor to have his first name revealed via the anime.


Language Name Reference to
Japanese オーキド ユキナリ博士 Dr. Yukinari Ōkido オーキッド Ōkiddo, Orchid. 大木戸 Ōkido is a Japanese family name and placename. Literally, big-tree family.
English, Spanish Professor Samuel (Sammy) Oak Oak tree, perhaps derived from Japanese Ōkido.
French Professeur Chen Chêne means Oak in French.
German Professor Eich Eiche means Oak in German.
Brazilian Portuguese Professor Samuel (Sam) Carvalho Carvalho means Oak in Portuguese.
Korean 오용호 박사 Dr. O Yongho 오 (伍) O is a Korean family name, probably chosen because of its similarity to the first syllable in Ōkido.
Chinese 大木博士 Dr. Dàmù
雪成・大木 Xuěchéng Dàmù (full name)
大木 is from 大木 Ōki
雪成 is from Japanese 雪成り yuki nari, "to become snow".

External links

OakElmBirchRowanJuniperJuniper Sr.SycamoreKukui
Professor OakMomBlueDaisyOld manBillMr. FujiSafari Zone WardenCopycatPrimo
Pokémon Fan Club ChairmanCelioLostelleTealaSelphyCalSteven StoneMayleneCameronMr. Game
Team RocketGym guideGym LeadersElite FourName RaterDay-Care ManProfessors' aidesMagikarp salesman
Anime characters
Protagonists Ash KetchumPikachuMistyTogeticBrockTracey SketchitMayMaxDawnPiplupIrisAxewCilanSerenaClemontBonnieDedenneLanaKiaweLillieSophoclesMallowRotom Pokédex
Rivals GaryRitchieHarrisonDrewHarleyMorrisonTysonSolidadPaulZoeyNandoKennyConwayBarryUrsulaTobiasTripBiancaBurgundyStephanGeorgiaCameronVirgilAlainAriaMietteTiernoShaunaTrevorNiniSawyer
Antagonists JessieJamesMeowthWobbuffetGiovanniButchCassidyDr. NambaMatoriPierceDr. ZagerShellyArchieTabithaMaxieHunter JSaturnMarsJupiterCyrusCharonColressAldithGhetsisBarretLysandreXerosicCelosiaBryonyMableAlianaTupperZipWrap
Professors Professor OakProfessor IvyProfessor ElmProfessor BirchProfessor RowanProfessor CarolinaProfessor JuniperCedric JuniperDr. FennelProfessor SycamoreProfessor Kukui
Relatives Delia KetchumFlintLolaForrestBrock's siblingsDaisyVioletLilyJames's parentsNanny and Pop-PopNormanCarolineJohannaChiliCressGraceMeyerLana's motherHarper and SarahLusamineGladionRangoSimaMimoKiawe's grandfatherAbeMallow's brotherSophocles's parents
Supporting Officer JennyNurse JoyMagikarp salesmanTodd SnapCharles GoodshowCaseyLizaSakuraLanceStevenMr. SukizoRaoul ContestaVivian MeridianRobertScottLilian MeridianMarianRhondaCynthiaReggieAngieLookerLyraKhouryDon GeorgeAlderLukeFreddy O'MartianIngoEmmetJervisNAnthea and ConcordiaPorterAlexaSophieCosetteClembotSanpeiMairinDianthaGurkinnMonsieur PierrePalermoKeananMalvaSquishyZ2Samson OakHobbesGym LeadersElite FourFrontier BrainsIsland KahunasMany temporary characters
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