A few questions, mostly concerning Double Battles. I'm completely new to this format, so please excuse my ignorance:
1) Abilities that absorb a type of move (Volt/Water Absorb, and Motor Drive, etc etc), are these affected by ALL moves of that type, such as status moves and attack moves? (Like Thunderwave on Motor Drive or Volt-A, or Surf on Water-A)?
Yes, as of Diamond and Pearl Thunder Wave triggers Motor Drive, Will-o-wisp for Flash Fire, etc.
2) Hail adds 1.5 to Ice-Type moves just like Rain/Sun does for Water/Fire, correct? More about Hail, does it have any other effects besides making Blizzard 100% Accurate?
No. All it does is build damage and make Blizzard accurate. There is no power boost.
3) Imprison. If I use Imprison and have Protect and Explode on my Pokemon and the opponent uses them on the same turn, exactly what would happen? Does Imprison pierce Protect (not breaks, like Feint) and not allow the use of Protect anymore, and what else?
Imprison has neutral priority, so Protect goes before Imprison, preventing it from affecting the Protector. If the Imprisioner is faster, the Pokémon using Explosion fails to attack. If they are locked into it somehow, next turn they will Struggle. If not, they can pick any move but Explosion.
4) Moves that hit all Pokemon or both opponents Pokes, how is the damage divided? Does that move do half of what it normally would to those Pokes targeted or something else?
Answered in the thread. There's a penalty to the Base Power but the moves attack them each individually.
5) Attack moves that I need clarification on, I need to know if they single, double, or field target:
Air Slash: Single?
Blizzard: Single?
Rock Slide: Double
-Powder Moves: Single
Lava Plume: ?
Eruption: ?
I think that's all.. I appreciate the help!
EDIT: Hmm.. A lot of this is explained in the double battles metagame thread... But not everything.