Deus: Nightmare Autarch said:1) ikr?
2) I'm guessing it checks for a Pokemon's Retreat Cost after all effects are applied, since that's what attacks like that usually do. (Go check Dusclops DP for an example.) That's what I would say.
Skyarrow Bridge is reducing the Pokemon's Retreat Cost, so you'd factor that in. So Galvantula could do gigantic damage to a Tornadus or Tornadus EX if there's a Skyarrow in play.
*Wants to turn the clock forward*
A Spider that is useful.