Question

Did Hoopa trap all non-Hoenn legendaries in each ring in ORAS?

Comments

Yes, I don't think there would be any reason not to think that, the rings look identical in every way and use the same transfer of matter physics

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Is this asking which legends aren't in the rings or if Hoopa was the cause of the rings?

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If Hoopa was the cause

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Can you actually be specific on what the dang question is?

Answer 1

There isn't any official confirmation of this, or deconfirmation of this, so there really is no way to know. Based on the fact that the rings look very similar, I think it is highly likely they are the same and Hoopa did this, but there is no way to know.