Pokécharms

There is no restriction on shiny Pokemon, but bear in mind that they are meant to be particularly rare color morphs and so shouldn't be all over the place. This is a 'common sense' thing.

Legendaries, however, are HEAVILY restricted and generally may not be used without permission. The specifics for how to ask for permission and what level of involvement is allowed for each Legendary can be found in our RP forum rules, which you really should have read by now considering the warning you received on the subject matter.