@SleepingSilencei definitely think Zekrom is off the list.. since Zekrom and Reshiram are higher tier legendary pokemon it would make them far too strong T>T
The issue with Darkrai are its powers.. the fact that its powers can only be countered by cresselia might cause issues??
i dunno maybe if you ask about NON major legendaries of each region? Excluding Darkrai and Cresselia of course..
this would be the list in my opinion, but you will have to confirm with
@Shiny KeldeoArticuno, Zapdos, Moltres, Entei, Suicune (iffy because Keldeo might have plans with this one considering it lives in a place mentioned in the RP), Raikou, Regirock, Regice, Registeel, Uxie, Mesprit, Azelf, Heatran, Kobalion, Terrakion, Virizion, Tornadus, Thunderus, Landorus (again, debatable, might be considered OP?), Volcanion (though not much is known about Volcanion yet, so that is debatable)
also Phione is a weird thing that no one wants to talk about XD