Okay I've been mulling it over.
I have; Mew, Mewtwo, The Kanto Birds, The Galarian Birds, Arceus, Marshadow, Suicune, Raikou, Cresselia, Hoopa and a Meoletta.
You currently have; Entei and the other Meoletta.
I was thinking I would have Lugia, you would have Ho-oh? I would like Giratina, Zacian and Yvetal; which means you could have Xerneas, Zamazenta and Dialga and Palkia?

I'll play Celebi, you can have Jirachi. I'll have Latias and you can have Latios.
With the titans; I'll play Regirock, Regidrago and Registeel, which means you can have Regice, Regigias, and Regieleki.
I'll have Rayquaza and Groudon, and you can have Kyogre.
Out of the Deoxys I'll have attack and speed, you can have neutral and defence.
You can play both of the Sea Duo if you'd like, and I'll tackle the Lake trio. I'll play Sky shaymin and you can play ground shaymin.
I'll give you Heatran, so it's a bit more balanced ahah.

I'll play Virizon and Keldeo; you can play Terrakion and Cobalion. You can have Thunderus, Tornadus and I'll have Landorus. You can have Resharim and Kyurem, I'll have Zekrom. You can have Genesect and I think I already showed Victini? If not I'll have Victini.
You can have Diance and Volcanion. I'll have tapu Lele and Tapu Bulu and you can have Koko and Fini.
I'll have Lunala and Cosmoem, you can have Solegeo and Cosmog.
Neither Necrozoma or the Uber beasts are invited to StarFall.
You can have Magearna and Zeraora, I'll have Meltan and you can have Melmetal.
I'll have Kubfu and Water Urshifu, you can have Dark Urshifu. I'll give you Calyrex and Glastrier, I'll have Spectrier. And I'll give you Zerude.

Does that sounds fair/good? Any tweaks you'd like to do?