>>33296122Celio as the prof, obvs.
I have some ideas for the starters, though.
I've always liked the idea of having not-starter mons as your starter, either pseudo-legendaries to at least feel special (Beldum, Larvitar, Deino as one set for example) or more common 3-stage mons (Geodude, Machop, Abra) since Sevii is just a less-developed offshoot of Kanto, so you get a more modest starting choice.
The latter option would also translate to things like items being rarer and more expensive, the Bike not being available, and other general luxuries reduced or removed. It'd be interesting to play a Sevii region game that's almost Nuzlocke-lite and more unforgiving.
The last idea for Starters would just be "Seviian" gen 1 starters, either;
>Start off normal, like Cubone and Pikachu do in Alola, then the 3rd stage is Seviian with a new subtype e.g. Water/Steel Blastoise, Grass/Fairy Venusaur, Fire/Figh-....something else for CharizardOr they're completely Seviian from the start like Alolan Geodude line.