All existing starters, gen 1 thru 9, have got some representation in Pocket by the end of B-series.

I collected Rainbow Rares of some starters by chance initially, so I thought I may as well go for a full binder of the starters with nice artwork.

Here's a binder of their fully-evolved forms:

It's still a work-in-progress; I am still looking for the Rainbow Rares of Typhlosion and Incineroar. But it's still so satisfying to see it all coming together.

And C-series would surely bring more 1-Stars and Rainbow Rares for those that are missing them, at which point this binder would look even more pretty.