Here is the new numbering system seen in Ruby/Sapphire. These are for the Pokémon which are unobtainable in R/S:

--
#203 Bulbasaur - #204 Ivysaur - #205 Venusaur

--
#206 Charmander - #205 Charmeleon - #206 Charizard

--
#209 Squirtle - #210 Wartortle - #211 Blastoise

--
#212 Caterpie - #213 Metapod - #214 Butterfree

--
#215 Weedle - #216 Kakuna - #217 Beedrill

--
#218 Pidgey - #219 Pidgeotto - #220 Pidgeot

-
#221 Rattata - #222 Raticate

-
#223 Spearow - #224 Fearow

-
#225 Ekans - #226 Arbok

--
#227 Nidoran - #228 Nidorina - #229 Nidoqueen

--
#230 Nidoran - #231 Nidorino - #232 Nidoking

-
#233 Clefairy - #234 Clefable

-
#235 Paras - #236 Parasect

-
#237 Venonat - #238 Venomoth

-
#239 Diglett - #240 Dugtrio

-
#241 Meowth - #242 Persian

-
#243 Mankey - #244 Primeape

-
#245 Growlithe - #246 Arcanine

--
#247 Poliwag - #248 Poliwhirl - #250 Poliwrath

--
#250 Bellsprout - #251 Weepinbell - #252 Victreebel

-
#253 Ponyta - #254 Rapidash

-
#255 Slowpoke - #256 Slowbro


#257 Farfetch'd

-
#258 Seel - #259 Dewgong

-
#260 Shellder - #261 Cloyster

--
#262 Gastly - #263 Haunter - #264 Gengar


#265 Onix

-
#266 Drowzee - #267 Hypno

-
#268 Krabby - #269 Kingler

-
#270 Exeggcute - #271 Exeggutor

-
#272 Cubone - #273 Marowak

/
#274 Hitmonlee / #275 Hitmonchan


#276 Lickitung


#277 Chansey


#278 Tangela


#279 Kangaskahn


#280 Mr. Mime


#281 Scyther


#282 Jynx


#283 Electabuzz


#284 Magmar


#285 Tauros


#286 Lapras


#287 Ditto

-//
#288 Eevee - #289 Vaporeon / #290 Jolteon / #291 Flareon


#292 Porygon

-
#293 Omanyte - #294 Omastar

-
#295 Kabuto - #296 Kabutops


#297 Aerodactyl


#298 Snorlax


#299 Articuno


#300 Zapdos


#301 Moltres

--
#302 Dratini - #303 Dragonair - #304 Dragonite


#305 Mewtwo


#306 Mew

--
#307 Chikorita - #308 Bayleef - #309 Meganium

--
#310 Cyndaquil - #311 Quilava - #312 Typhlosion

--
#313 Totodile - #314 Croconaw - #315 Feraligatr

-
#316 Sentret - #317 Furret

-
#318 Hoothoot - #319 Noctowl

-
#320 Ledyba - #321 Ledian

-
#322 Spinarak - #323 Ariados


#324 Cleffa

-
#325 Togepi - #326 Togetic

--
#327 Mareep - #328 Flaaffy - #329 Ampharos


#330 Sudowoodo


#331 Politoed

--
#332 Hoppip - #333 Skiploom - #334 Jumpluff


#335 Aipom

-
#336 Sunkern - #337 Sunflora


#338 Yanma

-
#339 Wooper - #340 Quagsire

/
#341 Espeon / #342 Umbreon


#343 Murkrow


#344 Slowking


#345 Misdreavus


#346 Unown

-
#347 Pineco - #348 Forretress


#349 Dunsparce


#350 Gligar


#351 Steelix

-
#352 Snubbull - #353 Granbull


#354 Qwilfish


#355 Scizor


#356 Shuckle


#357 Sneasel

-
#358 Teddiursa - #359 Ursaring

-
#360 Swinub - #361 Piloswine

-
#362 Remoraid - #363 Octillery


#364 Delibird


#365 Mantine

-
#366 Houndour - #367 Houndoom


#368 Porygon2


#369 Stantler


#370 Smeargle

-
#371 Tyrogue - #372 Hitmontop


#373 Smoochum


#374 Elekid


#375 Magby


#376 Miltank


#377 Blissey


#378 Raikou


#379 Entei


#380 Suicune

--
#381 Larvitar - #382 Pupitar - #383 Tyranitar


#384 Lugia


#385 Ho-oh


#386 Celebi

Pokémon Obtainable in Game

 
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