So with the datamining last night, a number of Pokemon sprites were left unscrubbed out of the game and make for what is very likely the Alolan Pokedex. I decided to breeze through the dex and try to point out all the interesting

We're making a number of assumptions here, but I think most of them can be grounded in previous generational transitions:

The TM List will remain relatively the same
Typical Move tutor exclusive attacks (Icy Wind, Helping Hand, Tailwind, Hyper Voice) will remain move tutor exclusive and unavailable for SuMo.
Non-Alolan forms of Alolan Pokemon are allowed, even if they require Pokemon Bank transfer
All Pokemon have access to their hidden abilities, which should be true once Pokemon Bank relaunches in January.

Regarding new Pokemon and Alolan formes:
I was a little iffy on purely alolan lines inheriting their non-alolan line's TMs and Egg moves and did not assume they obtained those moves.
Families that go from Non-Alolan -> Alolan probably keep the same egg moves and pre evo tms, but I neglected to assume this for now just in case.

What we can presume to be the Alolan Dex so far consists of:
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Butterfree
Raticate + Alolan Raticate
Fearow
Pikachu + Raichu + Alolan Raichu
Sandslash + Alolan Sandslash
Clefairy + Clefable
Ninetales + Alolan Ninetales
Wigglytuff
Crobat
Parasect
Dugrtio + Alolan Dugtrio
Persian + Alolan Persian
Golduck
Primape
Arcanine
Poliwrath + Politoed
Alakazam
Machamp
Tentacruel
Golem + Alolan Golem
Slowbro + Slowking
Magneton + Magnezone
Muk + Alolan Muk
Cloyster
Gengar
Hypno
Exeggutor + Alolan Exeggutor
Marowak + Alolan Marowak
Chansey + Blissey
Kangaskhan
Seaking
Staryu
Scyther + Scizor
Electivire
Magmortar
Pinsir
Tauros
Gyarados
Lapras
Ditto
Every Eevee Evolution
Porygon2 + Porygon Z
Aerodactyle
Snorlax
Dragonite

Ledian
Ariados
Lanturn
Sudowoodo
Murkrow + Honchkrow
Misdreavous + Mismagius
Granbull
Weavile
Corsola
Delibird
Skarmory
Porgyon2
Smeargle
Miltank

Pelliper
Masquerain
Hariyama
Probopass
Sableye
Sharpedo
Wailord
Torkoal
Spinda
Flygon
Whiscash
Milotic
Castform
Absol
Glalie + Froslass
Relicanth
Luvdisc
Salamence
Metagross

Rampardos
Bastiodon
Gastrodon
Drifblim
Garchomp
Lucario
Lumineon

Stoutland
Gigalith
Whimsicott
Lilligant
Krookodile
Carracosta
Archeops
Garbodor
Vanilluxe
Emolga
Alomamola
Braviary
Mandibuzz

Talonflame
Pangoro
Carbink
Goodra
Klefki
Trevenant

Rowlett2
Litten2
Popplio2
Pikipek2
Gumshoos
Charjabug + Vikavolt
Crabrawler2
Oricorio x4
Ribombee
Lycanroc Day + Lycanroc Night
Wishiwashi
Unnamed Urchin Pokemon
Mudsdale
Unnamed Water Skidder Pokemon
Florantis
Morelull2
Salandit2
Bewear
Tsareena
Comfey
Oranguru
Passimean
Wimpod2
Pallosand
Pyukumuku
Silvally
Minior
Komala
Turtonator
Togedemaru
Mimikyu
Bruxish
Drampa
Unnamed Anchor Pokemon
Komo-o
Tapu Koko
Unnamed Pink Tapu
Unnamed Red Tapu
Unnamed Purple Tapu
[/hide]

Pokemon with interesting Abilities and moves:

Intimidate:
Arcanine
Tauros
Gyarados
Granbull
Masquerain
Stoutland
Krookodile

Follow Me:
Clefairy
Clefable
Lucario

Rage Powder:
Butterfree
Parasect
Ariados

Fake Out:
Raichu
Persian
Kangaskhan
Weavile
Hariyama
Sableye
Spinda

Auto-set Weather and Terrains:
Ninetales
Politoed
Tapu Koko

Trick Room:
Alakazam
Slobro
Slowking
Gengar
Hypno
Exeggutor
Starmie
Porygon2
Porygon Z
Espeon
Misdreavus
Mismagius
Spinda
Kecleon
Whimsicott
Carbink
Trevenant

Tailwind:
Butterfree
Aerodactyl
Ledian
Murkrow
Honchkrow
Pelliper
Drifblim
Whimsicott
Rufflet
Mandibuzz
Talonflame

Quick Guard
Machamp
Crobat
Scizor
Lucario
Archeops
Talonflame
Pangoro

Wide Guard
Parasect
Machamp
Golem
Aerodactyl
Pelliper
Hariyama
Probopass
Bastiodon
Gigalith
Carracosta
Alomomola

Quick Guard-esc Abilities:
Bruxish
Tsareena

Lightning Rod
Raichu
Marowak
Alolan Marowak
Seaking
Togedemaru

Storm Dragin
Gastrodon
Lumineon

Swift Swim
Golduck
Poliwrath
Seaking
Lumineon
Carracosta

Chlorophyll
Exeggutor
Leafeon
Whimsicott
Lilligant

Surge Surfer
Alolan Raichu

Prankster:
Murkrow
Sableye
Whisicott
Klefki

Highly Accurate Sleep:
Butterfree (Compoundeyes Sleep Powder)
Parasect (Spore)
Smeargle (Dark Void)

Strong Priority:
Scizor
Metagross
Talonflame

Defiant / Competitive:
Wigglytuff
Primape
Milotic
Bravairy

Every Move I just posted:
Smeargle

Other Interesting Pokemon:

Charjabug: Battery
Passimean: Receiver
Oranguru: Instruct
Oricorio: Dancer

Strong Pokemon from Past Formats:
Raichu
Clefairy
Clefable
Crobat
Arcanine
Politoed
Gengar
Scizor
Gyarados
Smeargle
Hariyama
Sableye
Miltoic
Salamence
Metagross
Gastrodon
Garchomp
Lucario
Whimsicott
Talonflame

Pokemon that take minor to major hits if Move Tutors are Absent: 
Politoed (Icy Wind, Helping Hand)
Scizor (Bug Bite, Superpower)
Sylveon (Hyper Voice)