can the sheen reset on pokemon

[Evolve]

can the sheen reset on pokemon

[Orisiti]

no... unfortunatley once it is full, you must try again with a new pokemon... In platinum, it is possible to buy high level poffins (downstairs in the mall)
these are of a sufficient level to max a trait if the pokemon likes the flavor, so breed the pokemon you want to max until you find one that likes the flavor associated with the trait you want (such as dry for beauty), and buy the poffins to match...

Milotic presents an extra challenge in this, as you also want one with good stats...
To accomplis this, choose a nature that match the stats you want to boost and likes dry berries (This is a good nature guide) and find a ditto or female feebas with that nature, and breed it while it holds an everstone