Abilities » Mischievous Trick
Can I use Rotom's "Mischievous Trick" Poke-POWER when I have no cards in my deck, to put a Prize card into my deck?
No, you can't. That would be far too mischievous.
Source: Undaunted FAQ (2010-09-09), PUI Rules Team (2010-09-09)
Abilities » Mischievous Trick
When I switch a Prize card and a card from my Deck with Rotom's "Mischievous Trick" Poke-POWER, can I look at either card?
No, you cannot. Keep both cards face-down when you switch them.
Source: Undaunted FAQ (2010-09-09), PUI Rules Team (2010-09-09)