Arceus
normalArceus can be summoned in the Origin Dimension, which can be reached by playing the Azure Flute while standing still.
Locate Structure Command
/execute in lumymon:origin run tp 10 100 10000How to Obtain
Materials Checklist
First, craft the Azure Flute. This is how you get into the Origin Dimension.
Hold right-click while holding the Azure Flute. Do not move or else you'll have to do it again. The Azure Flute has infinite uses, so don't worry too much about using it.
There are 2 trainers here to beat (non-repeatable). Perula will drop the Lustrous Orb.
Damon will drop the Adamant Crystal.
After defeating the 2 of them, go to the back of the structure. Here, place all 18 plates gathered from the Sinnoh League locations to summon Arceus. A random Arceus (meaning with a random plate) will be spawned. The images show a zap plate and a splash plate Arceus.