If you use Silvally you will know it's like Arceus but weaker. It can fit almost any role. Here's some sets.
Sillvally @ Fighting/Fairy memory
Iron Head
Crunch
Multi-Attack
Swords Dance
+Att.,-Sp. Att, 252 attack and speed
A wall breaking set
Silvally @ Leftovers
Defog
Roar
Iron Defense
Crunch
+Def/Sp. Def, -Sp. Att, 252 Def/Sp. Def and HP
A bulky set