First of all, spelling FAIL! It's Arceus (pronounced ar-kee-us) , not arceaus. Second, to catch Arceus, you need to either cheat (what I did) or get it from an event.
You must get arceaus flute to catch it.
no p.s i know this because i beat the whole game and i did not have a mission to catch arceaus
Its a pokemon, NOT ANIMAL!
No you will have to trade.
never dude
No. Platnum and Black and White are two different gens. When they made/release Pokemon Platnum, they had no ideo about Reshiram and Zekrom. They focused more on Dialga, Palkia, Arceaus, ext.
no. only events
not until a event is released
You can use the shiny Pokemon action replay code and them catch arceaus
The arceaus event
heatran,moltres,infernape,magmortar,arceaus
Arceaus (but you can only get it through events)