Rhetus arcius was created in 1763.
U go to the trickmaster and defeat him then he'll give u Arcius
Just catch all the Pokemon first then arcius will come out so you needed to go around to find him
first of all it's arcius and you'll need the azure flute.play it at the spear pillar and some staircase comes.go up the staircase and arcius is there.
by a Nintendo event
Through an event, cheats, or trading
Its either lugia or dialga. no way its arcius
You either get it by an EVENT or you can TRADE or get an ACTION REPLAY.
You eat all the magic burritos and say pie.
u cant u have to use a r.
315 Pokemon including arcius i am awsome
There is no in-game way of getting Arceus in HG/SS.