Here is a sample list based of the version I played against last week: That list is admittedly very vanilla, but it will at least give you some structure to work with if you want to tech it out and make it your own
They also just so happen to be one of the few parts of the game that other major trading card games don't have, and while that does make Pokmon unique, it can also lead to problems like those that came up during the World Championship
The Wise Mothman makes everyone mill cards, triggering many synergies from cards like Syr Konrad, the Grim, while distributing +1/+1 counters around your creatures
I think the one thing I would've liked to see more of in the list are summon cards: if you look at our commander options, Tidus, Yuna's Guardian and Yuna, Grand Summoner, both clearly work exceptionally well with the new summon creatures like Summon: Valefor as Tidus can remove lore counters to keep them around longer and Yuna can pump up creatures when the summons die, and that's a unique new game design space that would differentiate the deck from more generic +1/+1 Counter lists out there
Any removal or creature buffs which are cheap enough special shout-out to Dark Knights Greatsword for its free equip cost are equally useful