The Klink line and Diglett line seem to be guaranteed based on the map and the trailer.
Don't know if it's been mentioned yet but I think it's safe to say Klink line (with at least Klang) will be in the games.
Maybe with a regional variant?
Maybe there will be a pokemon resembling them and the dex entry will mention some migration periodA UK region without the Gumshoos line would be tragic; Galar should be their home region.
God, I would love for the Unown to get more lore.Baltoy line and Unown (hopefully with updated stats and movesets).
It'd be fitting for Deerling, Sawsbuck, or Stantler to be in the Pokedex since deer are often used on royal crests/emblems.I would love Deerling and Sawsbuck to return in the Dex again.