That depends, if you want to give an accurate information you should tell the pokemon is MICHINA which is more harder to find than TRU one. The pokemon has the same moveset, level and stuff, the difference is pretty much the OT/IDNo and SID and sometimes the language. Is like to say you have a shokotan Pichu saying that you have the Gamestop Pichu, the pokemons are basically the same and they active the exact same sort of ingame events. Got it?
Danm! I'm getting too late at home latelly. And yes every single Arceus should be an event pokemon, if they aren't they are hacked ones, I mean even the DW released last year were event, nicknameble because the OT is the collector and not the event name. About the Arceus you sent for clone, it is a MICHINA one.