Question

This has been plagueing me for ages. Please, someone answer!

Answer 1

No. Arceus-Draco learns Draco Meteor. But it will keep it when changing forms.

Source: Experience

Comments

But if you teach Dragon-Arceus Draco Meteor, then any forme will have it, right???

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Yes, it will.

Answer 2

Yup.His movepool remains the same no matter what forme it is in.But when transformed into a dragon type it learns draco meteor which other formes cant learn as mew said.

Answer 3

Yes

Draco Meteor can only be tutored to Dragon-type Pokémon (with the exception of Arceus, which can learn it regardless of which Plate it's holding)

-bulbapedia

Any form of Arceus can learn draco meteor. That concludes every arceus have the same movepool