Is there an item that prevents tour Pokemon from lowering his speed?

Question

In Pokemon Y

Answer 1

White Herb is the only thing that will work, as it removes all bad status changes.
>An item to be held by a POKéMON. It restores any lowered stat in battle. It can be used only once. -White Herb Dex Page

Answer 2

There's not item that prevents speed loss.