Sol Legends: Mew

Your Rival is Trainer Oak.
Takes place during wartime? Silph Co is just starting out? Power Plant isn't entirely used yet?
Mr Pokemon is there? Mr Fuji?
== Map Changes ==
* 
== League ==
# Agatha, the leader of Lavender Town.
* Champion Oak
** Dragonite (his ace)
== Pokedex ==
# new starters
# Caterpie
# Metapod
# Butterfree
# Weedle
# Kakuna
# Beedrill
# Pidgey
# Pidgeotto
# Pidgeot
# Rattata
# Raticate
# Sentret - The Sentret line would eventually be pushed out of Kanto.
# Furret
# Spearow
# Fearow
# Ekans
# Arbok
# Pichu
# Pikachu
# Raichu
# Sandshrew
# Sandslash
# Nidoran F
# Nidorina
# Nidoqueen
# Nidoran M
# Nidorino
# Nidoking
# Cleffa
# Clefairy
# Clefable
# Vulpix
# Ninetales
# Igglybuff
# Jigglypuff
# Wigglytuff
# Hoppip
# Skiploom
# Jumpluff - Jumpluffs would eventually be pushed out of Kanto.
# Zubat
# Golbat
# Crobat
# Oddish
# Gloom
# Vileplume
# Bellossom
# Paras
# Parasect
# Venonat
# Venomoth
# Mareep
# Flaaffy
# Ampharos - As the Power Plant was established, and urban development pushed out room for agriculture, the Mareep line was gradually made redundant in Kanto.
# Diglett
# Dugtrio
# Meowth
# Persian
# Psyduck
# Golduck
# Mankey
# Primeape
# Hisuian Growlithe
# Hisuian Arcanine
# Poliwag
# Poliwhirl
# Poliwrath
# Politoed
# Abra
# Kadabra
# Alakazam
# Machop
# Machoke
# Machamp
# Bellsprout
# Weepinbell
# Victreebel
# Tentacool
# Tentacruel
# Geodude
# Graveler
# Golem
# Ponyta
# Rapidash
# Slowpoke
# Slowbro
# Slowking
# Farfetch'd
# Doduo
# Dodrio
# Seel
# Dewgong
# Grimer
# Muk
# Shellder
# Cloyster
# Gastly
# Haunter
# Gengar
# Onix
# Drowzee
# Hypno
# Krabby
# Kingler
# Hisuian Voltorb
# Hisuian Electrode
# Exeggcute
# Exeggutor
# Cubone
# Marowak
# Tyrogue
# Hitmonlee
# Hitmonchan
# Hitmontop
# Lickitung
# Lickilicky
# Koffing
# Galarian Weezing
# Rhyhorn
# Rhydon
# Happiny
# Chansey
# Blissey
# Tangela
# Tangrowth
# Kangaskhan
# Horsea
# Seadra
# Kingdra
# Goldeen
# Staryu
# Starmie
# Mime Jr
# Mr Mime
# Scyther
# Kleavor
# Scizor
# Smoochum
# Jynx
# Elekid
# Electabuzz
# Electivire
# Magby
# Magmar
# Magmortar
# Tauros
# Magikarp
# Gyarados
# Lapras
# Ditto
# Heracross
# Eevee
# Vaporeon
# Jolteon
# Flareon
# Umbreon
# Espeon
# Leafeon
# Glaceon
# Sylveon
# Munchlax
# Snorlax
# Audino
# Murkrow
# Honchkrow
# Misdreavus
# Mismagius
# Slugma
# Magcargo
# Stantler
# Wyrdeer
# Houndour
# Houndoom
# Larvitar
# Pupitar
# Tyranitar
# Hisuian Qwilfish
# Overqwil
# Sneasel
# Weavile
# Chikorita
# Bayleef
# Meganium
# Cyndaquil
# Quilava
# Typhlosion
# Totodile
# Croconaw
# Feraligatr
# Articuno
# Zapdos
# Moltres
# Dratini
# Dragonair
# Dragonite
# Mew
# Meltan 
# Melmetal
# Regieleki
# Regicosmo
no magnemite line? no fossils?
og porygon based off the dodo?
more primal primeape?
war octillery line? add in the war kalosian starters?
obviously, no Mewtwo.