Quoted By:
Both the Farfetch'd line and the Galarian Ponyta line are going to be three-stage lines.
Corviknight is the final evolution of the regional bird. First stage is a small jackdaw/crow with proportions like Fletchling. Not sure what the middle stage looks like.
Gamefreak have tried to go for an "open and expansive" feeling world, but a lot of the areas (at least the early ones) are void of anything interesting.
Marnie is more like Gladion than Lillie in terms of personality and role. Hop is literally just Hau but 2% more sarcastic at times.
The second lines of the starters aren't bad, so much as they're just boring, like a lot of middle-stage starters.
Galarian Meowth line is another version exclusive line, but I'm not sure what the other exclusive is (only played Shield). I want to say the Galarian Pikachu line is the Sword exclusive but I don't think they'd do that with Pikachu seeing as it's the mascot. There's an early game trade for Pikachu with Meowth shortly before Nessa's gym,
Storyline outside of "beat gyms, become champ" takes a backseat for the first 1/3rd of the game, not sure when it comes in big time.
Lots of mentions of other regions, mostly Kanto, Sinnoh and Unova.