While sharing cards seems simple in Pokemon TCG Pocket, here are certain things that might help you grab the cards missing in your decks
Artificer Class The only AFR class that didnt come from the main set, Artificer Class was printed in Battle for Baldurs Gate
The biggest downside to Erika is that, because it focuses entirely on Grass, it wont see much play in any other decks that dont specifically revolve around it
Necroface Necroface is a great beat-stick for banish orientated decks
(Ill leave discussion of what truly delineates CEDH from high power Commander to those more involved in that end of the format, however.) An Exhibition (1) deck is almost always built with some major quirk in mind
Beyond card images, there's a world of interesting AI/ML applications with Magic, like what others have worked on for drafting, deck optimization, and game play