You could take it further and only have Dexit moves legal. I submitted this as an OM a while ago and got denied. It’s just a banlistApparently nobody suggested this yet (perhaps for good reason)
Premise: The only Pokemon allowed are those currently not obtainable in Sword and Shield.
Explanation: I've seen a lot of SwSh based OMs and NatDex based OMs, but nothing based on the Pokemon which aren't available by any means. So I wondered what a metagame would look like if only the cut Pokemon could be used; think of it like the ones left behind trying to form a metagame as all their friends and foes were shipped off to Galar.
After two rounds of DLC, turns out there's not much left. Here's a list of FE Pokemon that would be available and not Uber:
Darkrai, Greninja-Ash, Arceus, Shaymin-Sky, Deoxys, Deoxys-Attack, Deoxys-Speed, Unown (For stability reasons)
Deoxys-Defense, Greninja, Hoopa-Unbound, Staraptor, Gliscor
This gives me serious Clean Slate vibes in the sense it's a super-condensed "micro-meta," and is reminiscent of older generations like RBY/GSC where the amount of Pokemon was just naturally small and you had to work with what you got. The pool of available Pokemon is absolutely tiny, and I think that opens up a lot of interesting teambuilding challenges.
Granbull and Florges are the only two fully-evolved Fairy types in the game.
There are ZERO Dragons.
Like Fast Electric types? There's only two that have over 100 Speed.
Steels are reaching PU territory of scarce.
Like Ice types? There's only two.
Like Normal and Bug types? We've plenty of those.
There's a combination of really strong Pokemon intermixed with some really niche options and some stuff which has been unviable for generations. Big names in Greninja, Gliscor, Serperior, Infernape, Hoopa, Empoleon, Breloom, Alolan Muk, Staraptor, Deoxys-Defense, and Manaphy, some mid-tier Pokes with sizeable viability such Forretress, Feraligatr, Swellow, Yanmega, Shaymin, Alomomola, Meloetta, Florges, and Venomoth, and some really strange options which I can't recall the last time they were important like Grumpig, Arbok, Golem, Electrode, Probopass, Floatzel, Zebstrika, Sawsbuck, Bruxish, and freaking Hypno.
I think this would end up being a really interesting meta if some of the more problematic Pokemon were banned, but it also could be... lame? There's not a lot of stand-out Pokemon and it could end up super-centralized as a result. On the other hand, it'd be nice to get to use these long-forgotten (mostly) Pokemon of the past.
I wanted to make something that brought these Pokemon back, not sure if there is enough going on here however. So I'm wondering: would you be interested in playing such a meta? Do you have ideas on how we can make things more interesting?
Do we allow any potential new moves listed here?
Would you like to see Mega Evolutions enabled? Medicham-Mega would probably get banned, maybe Beedrill too
Would you like to see lost moves returned? Unown would still be trash