So I made a preliminary Pokedex and the grand total has come to 318 pokemon. I'll list the evolutionary lines and sort them by type. I'll be updating the list one type at a time to avoid losing major progress.
Sound (15)
These are all Altesian Regional Variants:
Ludicolo(Sound/Grass)
Chingling and Chimecho (Sound/Psychic)
Bronzong (Steel/Sound)
Noibat and Noivern (Dragon/Sound)
Chatot (Sound/Flying)
These are retypings:
Whimsur, Loudred, and Exploud (Sound)
Kricketot and Kricketune (Bug/Sound)
Igglybuff, Jigglypuff, and Wigglytuff (Fairy/Sound)
Grass (21)
The Grass Starters: Turtwig, Grotle, and Torterra
Bellsprout, Weepinbell, and Victreebel
Seedot, Nuzleaf. and Shiftry
Shroomish and Breloom
Cherubi and Cherrim
Snover and Abombasnow
Phantump and Trevenant
Pumpkaboo and Gourgeist
Pansage and Simisage
Fire (16)
The Fire Starters: Charmander, Charmeleon, and Charizard
Vulpix and Ninetails
Growlithe and Arcanine
Ponyta and Rapidash
Pansear and Simisear
Houndour and Houndoom
Torkoal
Litleo and Pyroar
Water (26)
The Water Starters: Totodile, Croconaw, and Feraligatr
Poliwag, Poliwhirl, Poliwrath, and Politoed
Magikarp and Gyrados
Mantyke and Mantine
Remoraid and Octillery
Corsola
Corphish and Crawdaunt
Clauncher and Clawitzer
Shellos and Gastrodon
Carvanha and Shar****
Lotad and Lombre
Panpour and Simipour
Ice (13)
Swinub, Piloswine, and Mamoswine
Sneasel and Weavile
Delibird
Snorunt, Glalie, and Froslass
Cubchoo and Beartic
Bergmite and Avalugg
Electric (17)
Pichu, Pikachu, and Raichu
Elekid, Electabuzz, and Electivire
Mareep, Flaafy, and Ampharos
Electrike and Manectric
Shinx, Luxio, and Luxray
Tynamo, Elektrik, and Elektross
Normal (24)
Rattata and Raticate
Tauros
Miltank
Stantler
Smeargle
Sentret and Furret
Ditto
Lickitung and Lickilicky
Castform
Skitty and Delcatty
Porygon, Porygon2, and Porygon-Z
Lillipup, Herdier, and Stoutland
Glameow and Purugly
Buneary and Lopunny
Flying (16)
Spearow and Fearow
Hoothoot and Noctowl
Murkrow and Honchkrow
Togepi, Togetic, and Togekiss
Wingull and Pelipper
Starly, Staravia, and Staraptor
Rufflet and Braviary
Bug (24)
Caterpie, Metapod, and Butterfree
Weedle, Kakuna, and Beedrill
Scyther and Scizor
Pinsir
Heracross
Shuckle
Yanma and Yanmega
Nincada, Ninjask, and Shedinja
Venipede, Whirlipede, and Scolipede
Grubbin, Charjabug, and Vikavolt
Wimpod and Golisopod
Poison (15)
Ekans and Arbok
Nidoran♂, Nidorino, and Nidoking
Nidoran♀, Nidorina, and Nidoqueen
Seviper
Stunky and Skuntank
Trubbish and Garbodor
Skrelp and Dragalge
Fighting (12)
Mankey and Primeape
Tyrogue, Hitmonlee, Hitmonchan, and Hitmontop
Croagunk and Toxicroak
Pancham and Pangoro
Crabrawler and Crabominable
Dark (9)
Poochyena and Mightyena
Absol
Purrloin and Liepard
Pawniard and Bisharp
Zorua and Zoroark
Ghost (13)
Gastly, Haunter, and Gengar
Shuppet and Banette
Duskull, Dusclops, and Dusknoir
Spiritomb
Litwick, Lampent, and Chandelure
Dhelmise
Psychic (22)
Abra, Kadabra, and Alakazam
Smoochum and Jynx
Spoink and Grumpig
Ralts, Kirlia, Gardevoir, and Gallade
Lunatone
Solrock
Solosis, Duosion, and Reuniclus
Elgyem and Beheeyam
Espurr and Meowstic
Inkay and Malamar
Ground (15)
Sandshrew and Sandslash
Cubone and Marowak
Phanpy and Donphan
Baltoy and Claydol
Sandile, Krokorok, and Krookodile
Golett and Golurk
Sandyghast and Palossand
Rock (16)
Onix and Steelix
Rhyhorn, Rhydon, and Rhyperior
Bonsly and Sudowoodo
Larvitar, Pupitar, and Tyranitar
Roggenrola, Boldore, and Gigalith
Dwebble and Crustle
Rockruff and Lycanroc
Minior
Steel (17)
Skarmory
Pineco and Forretress
Beldum, Metang, and Metagross
Aron, Lairon, and Aggron
Bronzor
Karrablast and Escavalier
Honedge, Doublade, and Aegislash
Meltan and Melmetal
Fairy (12)
Cleffa, Clefairy, and Clefable
Snubull and Granbull
Flabébé, Floette, and Florges
Spritzee and Aromatisse
Carbink
Mimikyu
Dragon (15)
Bagon, Shelgon, and Salamence
Trapinch, Vibrava, and Flygon
Gible, Gabite, and Garchomp
Axew, Fraxure, and Haxorus
Deino, Zweilous, and Hydreigon