You need a event that is over so now you can only cheat to get it :(
you can't encounter Arceus in PMD sky. he only makes a cameo appearance at the top of the destiny tower.
with a item only in explorers of sky
in yo house man
yes
Yes but you need to conect with them.
no sky gifts are only on PMD 3 (Pokemon Mystery Dungeon Explorers of Sky)
YOU can not get arceus in any game!
It's either Sky Peak or Spatcial Rift.
Yes, Arceus and Shaymin are both featured in Pokemon Explorers of Sky.
nope
hi
You can't be a Munchlax for your main pokemon. Sorry.