Abilities » Ancient Power | Trainers » Rare Candy
Does Rare Candy override evolution-preventing effects such as Archeops' "Ancient Power" Ability?
Ancient Power does not allow you to use a Pokemon's attack or play a Trainer card to evolve your Benched or Active Pokemon, unless the Evolution card you would be putting into play comes from somewhere other than your hand. So Rare Candy cannot be used while Archeops' Ancient Power Ability is in effect.
Source: Noble Victories FAQ (2011-11-17), PUI Rules Team (2011-11-17), PUI Rules Team (2011-11-21)
Abilities » Ancient Power
Does Archeops' "Ancient Power" Ability stop attacks that evolve Pokemon, such as Karrablast's "Mysterious Evolution"?
Ancient Power only prevents you from playing Pokemon from your hand to evolve other Pokemon. Mysterious Evolution's effect is not stopped because it evolves the Pokemon from a card in the deck, not a card in your hand.
Source: Noble Victories FAQ (2011-11-17), PUI Rules Team (2011-11-17)