to get arceus,you need mystery gift or action replay.....
im sorry, all i know what to do with mystery gifft is u need 6 or more to open the action replay
ill tell you how to get mystery gift....
go to 3 floor in jublife tv and go down talk to the reporter and he'll ask you to give your opinion on tv the first two words are
'everyone happy' the second two words are 'Wi-Fi connection' and he gives you the mystery gift
thanks for reading