[REQUEST] Configurable option to disable/enable usage on Legendaries/Ultra Beasts

[Roguevashda]

Is your feature request related to a problem? Please describe.
This goes hand in hand with my previous feature request. You have that shiny Diglett, but you remove the shininess and obtain the token, as a server owner, you wouldn't really want people to be able to trade a Shiny Diglett and a normal Celebi for a Shiny Celebi and a normal Diglett; the economy could get ruined fairly easily with this.

Describe the solution you'd like
So, the ability of Server Owners to toggle whether they can be used on Legendaries or Ultra Beasts could mitigate it if such a thing were to arise in the future; possible even adding a tag to the item to signify "This was removed from a Pokémon, and is unusable on Legendaries/Ultra Beasts", potentially to differentiate a normal Shiny Item that can be used on Legendaries/Ultra Beasts, and the degraded? Shiny Item that can only be used on regular Pokémon.