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Sr. and Jr. (Trainer class)

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Sr. and Jr.
センパイとコウハイ Senpai and Kōhai
Spr RS Sr and Jr.png
Sr. and Jr. sprite from Ruby, Sapphire, and Emerald
Other names
Introduced in Generation III
Appears in Ruby, Sapphire, and Emerald
Gender Both female
Counterpart Lass
Notable members {{{members}}}
Anime debut [[]]
TCG debut [[ (TCG)|]]
TCG card {{{card}}}
Manga debut {{{manga}}}

Sr. and Jr. (Japanese: センパイとコウハイ Senpai and Kōhai) are a pair of Pokémon Trainers that first debuted in the Generation III games. They appear to be a team of two Lasses, one acting as a mentor for the other.

They raise a variety of different Pokémon used in Double Battles, with one Pokémon being a few levels higher than the other.


Spr RS Sr and Jr.png
Sprite from
Ruby, Sapphire, and Emerald
Lass RSE OD.pngLass RSE OD.png
Overworld sprites from
Ruby, Sapphire, and Emerald

Trainer list

Pokémon Ruby and Sapphire

Pokémon Emerald

In other languages

Language Title
France Flag.png French Sr et Jr
Germany Flag.png German Senior und Junior
Italy Flag.png Italian Senior & Jr
Spain Flag.png Spanish Estudiantes

Trainer classes in the Pokémon main series
Hoenn Ace Trainer*Aqua AdminSEAqua LeaderSEAroma LadyBackpackerORASBattle GirlBeautyBird KeeperBlack Belt
Bug CatcherBug ManiacCamperChampionCollectorDelinquentORASDragon TamerElite FourExpertFisherman
GentlemanGuitaristHex ManiacHikerInterviewerKindlerLadyLassLeaderMagma AdminREMagma LeaderRE
Ninja BoyOld CoupleParasol LadyPicnickerPokéfanPokéManiacPKMN RangerPKMN TrainerPKMN Breeder
PsychicRich BoyRuin ManiacSailorSchool KidSis and BroSr. and Jr.Street ThugORASSwimmer
Team Aqua GruntSEASTeam Magma GruntREORTriathleteTuberTwinsWinstrateYoung CoupleYoungster
Arena TycoonEDome AceEFactory HeadEPalace MavenEPike QueenEPyramid KingESalon MaidenE
Secret Base ExpertORAS
Project CharacterDex logo.png This Trainer Class article is part of Project CharacterDex, a Bulbapedia project that aims to write comprehensive articles on each character found in the Pokémon games.