Name: Korean name for Arceus OT: A Korean player ID No.: 12235 Nature:Serious Wishing Ribbon A fateful encounter seems to have led it across space and time from the Hoenn region. Level:100 Moves: Judgment Blast Burn Hydro Cannon Earth Power Cherish Ball
According to Serebii, your Arceus isn't supposed to be shiny, meaning it's illegal. Source: https://www.serebii.net/events/dex/493.shtml. Just scroll down until you see the first "South Korea" and then find your Arceus. There has only been one shiny Arceus event for Japan, not Korea.