These are the Pokémon from Generation III of the series (#252 - #386).
These are the Pokémon from Sapphire, Ruby, and Emerald.

#252 Treecko
Grass

#253 Grovyle
Grass

#254 Sceptile
Grass

#255 Torchic
Fire

#256 Combusken
Fire Fighting

#257 Blaziken
Fire Fighting

#258 Mudkip
Water

#259 Marshtomp
Water Ground

#260 Swampert
Water Ground

#261 Poochyena
Dark

#262 Mightyena
Dark

#263 Zigzagoon
Normal

#264 Linoone
Normal

#265 Wurmple
Bug

#266 Silcoon
Bug

#267 Beautifly
Bug Flying

#268 Cascoon
Bug

#269 Dustox
Bug Poison

#270 Lotad
Water Grass

#271 Lombre
Water Grass

#272 Ludicolo
Water Grass

#273 Seedot
Grass

#274 Nuzleaf
Grass Dark

#275 Shiftry
Grass Dark

#276 Taillow
Normal Flying

#277 Swellow
Normal Flying

#278 Wingull
Water Flying

#279 Pelipper
Water Flying

#280 Ralts
Psychic Fairy

#281 Kirlia
Psychic Fairy

#282 Gardevoir
Psychic Fairy

#283 Surskit
Bug Water

#284 Masquerain
Bug Flying

#285 Shroomish
Grass

#286 Breloom
Grass Fighting

#287 Slakoth
Normal

#288 Vigoroth
Normal

#289 Slaking
Normal

#290 Nincada
Bug Ground

#291 Ninjask
Bug Flying

#292 Shedinja
Bug Ghost

#293 Whismur
Normal

#294 Loudred
Normal

#295 Exploud
Normal

#296 Makuhita
Fighting

#297 Hariyama
Fighting

#298 Azurill
Normal Fairy

#299 Nosepass
Rock

#300 Skitty
Normal

#301 Delcatty
Normal

#302 Sableye
Dark Ghost

#303 Mawile
Steel Fairy

#304 Aron
Steel Rock

#305 Lairon
Steel Rock

#306 Aggron
Steel Rock

#307 Meditite
Fighting Psychic

#308 Medicham
Fighting Psychic

#309 Electrike
Electric

#310 Manectric
Electric

#311 Plusle
Electric

#312 Minun
Electric

#313 Volbeat
Bug

#314 Illumise
Bug

#315 Roselia
Grass Poison

#316 Gulpin
Poison

#317 Swalot
Poison

#318 Carvanha
Water Dark

#319 Sharpedo
Water Dark

#320 Wailmer
Water

#321 Wailord
Water

#322 Numel
Fire Ground

#323 Camerupt
Fire Ground

#324 Torkoal
Fire

#325 Spoink
Psychic

#326 Grumpig
Psychic

#327 Spinda
Normal

#328 Trapinch
Ground

#329 Vibrava
Ground Dragon

#330 Flygon
Ground Dragon

#331 Cacnea
Grass

#332 Cacturne
Grass Dark

#333 Swablu
Normal Flying

#334 Altaria
Dragon Flying

#335 Zangoose
Normal

#336 Seviper
Poison

#337 Lunatone
Rock Psychic

#338 Solrock
Rock Psychic

#339 Barboach
Water Ground

#340 Whiscash
Water Ground

#341 Corphish
Water

#342 Crawdaunt
Water Dark

#343 Baltoy
Ground Psychic

#344 Claydol
Ground Psychic

#345 Lileep
Rock Grass

#346 Cradily
Rock Grass

#347 Anorith
Rock Bug

#348 Armaldo
Rock Bug

#349 Feebas
Water

#350 Milotic
Water

#351 Castform
Normal (Fire or Water or Ice)

#352 Kecleon
Normal

#353 Shuppet
Ghost

#354 Banette
Ghost

#355 Duskull
Ghost

#356 Dusclops
Ghost

#357 Tropius
Grass Flying

#358 Chimecho
Psychic

#359 Absol
Dark

#360 Wynaut
Psychic

#361 Snorunt
Ice

#362 Glalie
Ice

#363 Spheal
Ice Water

#364 Sealeo
Ice Water

#365 Walrein
Ice Water

#366 Clamperl
Water

#367 Huntail
Water

#368 Gorebyss
Water

#369 Relicanth
Water Rock

#370 Luvdisc
Water

#371 Bagon
Dragon

#372 Shelgon
Dragon

#373 Salamence
Dragon Flying

#374 Beldum
Steel Psychic

#375 Metang
Steel Psychic

#376 Metagross
Steel Psychic

#377 Regirock
Rock

#378 Regice
Ice

#379 Registeel
Steel

#380 Latias
Dragon Psychic

#381 Latios
Dragon Psychic

#382 Kyogre
Water

#383 Groudon
Ground

#384 Rayquaza
Dragon Flying

#385 Jirachi
Steel Psychic

#386 Deoxys
Psychic

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