I would like to finally see Venonat and Venomoth in a regional Dex outside of Kanto and Johto for once. Tentacool will be likely given it’s been in every regional Dex excluding Unova and Galar (excluding DLC). Staryu and Shellder have been in a few lately, maybe have them as version counterparts like in FR/LG and X/Y.
Yeah, I did the research and found that not counting Mew, the Venonat family are the only Pokemon that are in both the Kanto and Johto dexes that have yet to appear in any other regional dex. I also checked the others and found that from generations two through seven, in addition to all mythicals, and counting the Sinnoh and Hisui dexes as one, the Pokemon that are still locked into their regional dexes of origin are the Chikorita and Totodile families, the legendary beasts, the tower duo, the Hoenn starter families, the Shroomish family, the Cacnea family, the eon duo, the weather trio, the Sinnoh starter families, the Kricketot family, the Glameow family, the lake spirits, the reality trio, Heatran, Regigigas, Cresselia, the Snivy and Tepig families, the Blitzle family, the Sewaddle family, the Deerling family, the Tynamo family, the tao trio, the Kalos starter families, the Scatterbug family, the Skiddo family, Xerneas and Yveltal, the Litten and Popplio families, the Pikipek family, the Yungoos family, the Crabrawler family, Oricorio, Minior, Komala, Bruxish, the island guardians, the Cosmog family and Necrozma, and all the Ultra Beasts. Willing to bet some of them will be in the new Pokedex for this new region.
Honestly if by mistake or intentional, Meowth seems to be the mascot for gimmicks and regional variants. So even if it has a lot of forms, I can see it getting much more.
And that means Team Rocket's Meowth will be very jealous, since he was born in regular form.