Ruling Question About This Dual-Type Card

[Monsterblood12]

because it is metal AND dark type, would the card's attack increase by 10 and have damaged to her reduced by 10 if it had both a metal and a dark energy attached to it?

dark and metal energies
http://pokebeach.com/scans/ex-holon-phantoms/94-darkness-energy.jpg
http://pokebeach.com/scans/ex-holon-phantoms/95-metal-energy.jpg

Also, can you attach energy cards to fossil pokemon / trainers? such as this one:

 

[Brave Vesperia]

Yes, the effects of Special Darkness and Special Metal Energy would apply to Delta Cradily.

As for your 2nd question, I'm not entirely sure, but I would say yes due to it being treated as a Basic Pokémon. Other Professors feel free to chime in on this one.

 

[Angela Anuszewski]

Yes, you can attach energy. And you can even use tools that give it an attack.

 

[Monsterblood12]

And you can even use tools that give it an attack
----
What do you mean by this?

 

[Angela Anuszewski]

You can attach something like Multi Technical Machine 01.