Done Gen 4: Arceus without Multitype should be able to gain/lose Plates

[Cazenovia]

What type of bug are you reporting? Mechanics

What is the bug?
Exclusively in Gen 4, Arceus can be tricked a Plate as long as it does not have the ability Multitype, as it is only the ability prevents the Pokemon from gaining/losing a plate, not the Pokemon species. PS! does not currently have this implemented, as Trick will fail when used to give a plate to a non-Multitype Arceus.

Are you able to replicate it? If so, how?
PS! Replay | Cartridge Footage

 

[Hydrametr0nice]

• Can a non-Multitype Arceus use trick to steal a plate?
• Can a non-Multitype Arceus use trick to give a plate?
• Can a Pokémon steal a plate from a non-Multitype Arceus?

I don't have the means to discover this, but if you do, I can code it.

 

[Cazenovia]

• Can a non-Multitype Arceus use trick to steal a plate?
• Can a non-Multitype Arceus use trick to give a plate?
• Can a Pokémon steal a plate from a non-Multitype Arceus?

I don't have the means to discover this, but if you do, I can code it.

The answer to each of these questions is yes, but I already submitted a pull request to fix the issue last month. Thank you for offering though!