Here's an Illustrious model of "Arceus" from pokémon.
The classic & Shiny one are okay, but the beta form is not on point. (For the beta form I recommand to mix it with this model from mystery117)
Trigger word :
G0D-Pkmn, Arceus, pokemon (creature), horns, green sclera, red eyes, tail, grey skin, white fur, You can add for more accuracy : golden spiked ring around body, golden hoof, four-legged animal
For Feral : Feral
For Humanoid/Anthro version : Anthro (Or also Centaur or "taur" for a centauric anthro)
For Girl (humanoid) version : Rule63 (You can also use Futa for futa version)
For Normal Shiny Form : Shiny form, yellow fur
For the Beta form : Beta-Arceus, pokemon (creature), orange eyes, Yellow ocher skin
If you don't know what to remove for correct use. Just look at the tags of the pic from the model.