How to catch LEGIT ARCEUS without cheats in Diamond,Pearl,Platinum

PK4: Unreleased Hall of Origin Arceus - Unreleased/Beta PKM Gallery - Project Pokemon Forums

Pokémon Gold and Silver (Video Game) - TV Tropes

Pokémon Bank and Hacked Pokémon

Pokemon Platinum [USA] Action Replay Official Code List

Get out from Mystery Zone in Diamond/Pearl/Platinum.

Post Game - Pokemon Diamond, Pearl and Platinum Guide - IGN

Pokemon Platinum Secret Key Rotom Room Unlock Event Mail-In Distribution

These two events were officially distributed to Pokemon Platinum and those thus count as legitimate. Still wishing to receive a Darkrai, Shaymin and

Pokemon Darkrai Shaymin Arceus Event Distribution for Diamond Pearl Platinum

[discuss] Found Shiny Arceus when looking through my save file from Platinum, any way to know if it's legit? : r/ShinyPokemon

Post Game - Pokemon Diamond, Pearl and Platinum Guide - IGN

How to get Arceus in Pokemon Platinum - Quora

Pokemon Azure Flute Arceus Event Distribution Service for Diamond Pearl Platinum

How to get Arceus in Pokemon Platinum - Quora