If I have no hand, can I use Sableye's "Impersonate" attack to get & discard a Bebe's Search? I can't use the effect of Bebe's Search because I can't put a card on top of the deck before I search, Does this also mean that I can't select Bebe's Search to begin with?
You can use Impersonate to search for the card, discard it, then shuffle your deck. But since you don't meet the requirements for using Bebe's Search you cannot use its effect.
Source: PUI Rules Team (2009-04-02)