>>18843405The interview I read said that they skipped the event for Arceus because of negative feedback/ confusion from the younger audience on how to pick up/collect the event legendary.
As for the Shaymin and Darkrai events in D/P, yes those were skipped over because of the E4 surf glitch, and the D/P Shaymin wasn't capable of collecting the Gracidea Flower. you needed a Platinum Shaymin to do that.