Sorry about, I have been using the word "Notch Ear" instead of "Spiky Ear" for quite awhile .
You might have had a side affect with one of the codes you were using.
Here you go!
It will give you 999 Hp/773 Atk/999 Def/999 Sp.Atk/999 Sp.Def/999 Speed Stats depending on your Pokémon's Nature in your PC.
Sorry, but this is the closest Stats you can get!
Yes, it will make Wild Pokémon, Hatch Pokémon, All Legendary Pokémon Shiny. If you want to make your own Pokémon Shiny, then use the Marking Shiny code, but only Mark a Pokémon by going to Move Pokémon, not Deposit Pokémon.
You must have the National Pokédex inorder to do the Arceus Event.
Obtain National Pokédex: Press Select
After you Obtain the National Pokédex, use this code.
Arceus Event: Press Select
Pick it up via PokéMart